diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index fcc1d69..2101b9a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,6 +11,7 @@ jobs:
     name: Linux C++
 
     runs-on: ${{ matrix.os }}
+    continue-on-error: ${{ matrix.cxx == 'clang++' && matrix.os == 'ubuntu-20.04' }}
     strategy:
       matrix:
         os: [ubuntu-20.04, ubuntu-22.04, ubuntu-24.04]
@@ -68,7 +69,7 @@ jobs:
         python3 -m pip install --upgrade pip
         python3 -m pip install ruff
     - name: Script
-      run: ruff check --output-format=github --target-version py37 --select F,E4,E7,E9,W,I,D,UP,YTT,ANN,S,BLE,B,A,COM819,C4,T10,EM,EXE,ISC,ICN,G,PIE,PYI,Q,RSE,RET,SLF,SLOT,SIM,TID,TCH,ARG,PGH,PL,TRY,FLY,PERF,FURB,LOG,RUF --preview --ignore W191,D211,D213,D401,PLR09,PLR1702,PLR2004,FURB101,FURB167,RUF001,RUF002,RUF003,RUF023 .
+      run: ruff check --output-format=github --target-version py37 --select F,E4,E7,E9,W,I,D,UP,YTT,ANN,S,BLE,B,A,COM819,C4,T10,EM,EXE,ISC,ICN,G,PIE,PYI,Q,RSE,RET,SLF,SLOT,SIM,TID,TC,ARG,PGH,PL,TRY,FLY,PERF,FURB,LOG,RUF --preview --ignore W191,D211,D213,D401,PLR09,PLR1702,PLR2004,FURB101,FURB167,RUF001,RUF002,RUF003,RUF023 .
       continue-on-error: true
 
   Python:
diff --git a/README.md b/README.md
index fcbf5a2..6cc5c5a 100644
--- a/README.md
+++ b/README.md
@@ -544,7 +544,7 @@ Other compilers should work as well, but are not (yet) tested.
 
 Run with: `./graphs`
 
-If `height` is `0`, it will be set to the current height of the terminal (number of rows times four). If `width` is `0`, it will be set to the current width of the terminal (number of columns times two).
+If `height` is `0`, it will be set to the current height of the terminal (number of rows). If `width` is `0`, it will be set to the current width of the terminal (number of columns).
 
 #### Output array as histogram
 
@@ -557,8 +557,8 @@ using namespace std;
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -588,8 +588,8 @@ using namespace std;
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -623,8 +623,8 @@ using namespace std;
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -654,8 +654,8 @@ using namespace std;
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -696,8 +696,8 @@ double afunction(double x)
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -719,8 +719,8 @@ using namespace std;
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -759,8 +759,8 @@ double function2(double x)
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -787,8 +787,8 @@ using namespace std;
 
 int main()
 {
-	size_t height = 160;
-	size_t width = 160;
+	size_t height = 40;
+	size_t width = 80;
 
 	long double xmin = -20;
 	long double xmax = 20;
@@ -874,10 +874,16 @@ Values:
 
 1. `type_braille`: Braille (default)
 	![](images/type%20braille%20graph.png)
-2. `type_block`: Block
+2. `type_block_quadrant`: Block quadrant
 	![](images/type%20block%20graph.png)
+3. `type_separated_block_quadrant`: Separated block quadrant
+4. `type_block_sextant`: Block sextant
+5. `type_separated_block_sextant`: Separated block sextant
+6. `type_block_octant`: Block octant
 
-The Braille type has the highest resolution of 2×4 pixels per character, while the block type uses 2×2. This option is only used for plots and graphs. Histograms use 1×8 pixels per character.
+The Braille and block octant types have the highest density of 2×4 pixels per character, while the two block sextant types use 2×3 and the two block quadrant types use 2×2. This option is only used for plots and graphs. Histograms use 1×8 pixels per character.
+
+The block sextant type requires support for Unicode 13.0, while the separated block quadrant, separated block sextant and block octant types require support for Unicode 16.0.
 
 #### Mark type
 
diff --git a/graphs.cpp b/graphs.cpp
index 7e5d4ca..6328096 100644
--- a/graphs.cpp
+++ b/graphs.cpp
@@ -45,8 +45,8 @@ constexpr long double function5(long double x)
 
 int main()
 {
-	const size_t height = 160;
-	const size_t width = 160;
+	const size_t height = 40;
+	const size_t width = 80;
 
 	const long double xmin = -20;
 	const long double xmax = 20;
diff --git a/graphs.hpp b/graphs.hpp
index d32855d..cdc01d9 100644
--- a/graphs.hpp
+++ b/graphs.hpp
@@ -77,24 +77,37 @@ namespace graphs
 
 	enum color_type const color_types[] = {color_default, color_black, color_red, color_green, color_yellow, color_blue, color_magenta, color_cyan, color_white, color_gray, color_bright_red, color_bright_green, color_bright_yellow, color_bright_blue, color_bright_magenta, color_bright_cyan, color_bright_white};
 
-	const char *const colors[] = {"\e[39m", "\e[30m", "\e[31m", "\e[32m", "\e[33m", "\e[34m", "\e[35m", "\e[36m", "\e[37m", "\e[90m", "\e[91m", "\e[92m", "\e[93m", "\e[94m", "\e[95m", "\e[96m", "\e[97m"};
+	const unsigned char colors[] = {39, 30, 31, 32, 33, 34, 35, 36, 37, 90, 91, 92, 93, 94, 95, 96, 97};
 
 	const char *const dots[] = {"⠀", "⠁", "⠂", "⠃", "⠄", "⠅", "⠆", "⠇", "⠈", "⠉", "⠊", "⠋", "⠌", "⠍", "⠎", "⠏", "⠐", "⠑", "⠒", "⠓", "⠔", "⠕", "⠖", "⠗", "⠘", "⠙", "⠚", "⠛", "⠜", "⠝", "⠞", "⠟", "⠠", "⠡", "⠢", "⠣", "⠤", "⠥", "⠦", "⠧", "⠨", "⠩", "⠪", "⠫", "⠬", "⠭", "⠮", "⠯", "⠰", "⠱", "⠲", "⠳", "⠴", "⠵", "⠶", "⠷", "⠸", "⠹", "⠺", "⠻", "⠼", "⠽", "⠾", "⠿", "⡀", "⡁", "⡂", "⡃", "⡄", "⡅", "⡆", "⡇", "⡈", "⡉", "⡊", "⡋", "⡌", "⡍", "⡎", "⡏", "⡐", "⡑", "⡒", "⡓", "⡔", "⡕", "⡖", "⡗", "⡘", "⡙", "⡚", "⡛", "⡜", "⡝", "⡞", "⡟", "⡠", "⡡", "⡢", "⡣", "⡤", "⡥", "⡦", "⡧", "⡨", "⡩", "⡪", "⡫", "⡬", "⡭", "⡮", "⡯", "⡰", "⡱", "⡲", "⡳", "⡴", "⡵", "⡶", "⡷", "⡸", "⡹", "⡺", "⡻", "⡼", "⡽", "⡾", "⡿", "⢀", "⢁", "⢂", "⢃", "⢄", "⢅", "⢆", "⢇", "⢈", "⢉", "⢊", "⢋", "⢌", "⢍", "⢎", "⢏", "⢐", "⢑", "⢒", "⢓", "⢔", "⢕", "⢖", "⢗", "⢘", "⢙", "⢚", "⢛", "⢜", "⢝", "⢞", "⢟", "⢠", "⢡", "⢢", "⢣", "⢤", "⢥", "⢦", "⢧", "⢨", "⢩", "⢪", "⢫", "⢬", "⢭", "⢮", "⢯", "⢰", "⢱", "⢲", "⢳", "⢴", "⢵", "⢶", "⢷", "⢸", "⢹", "⢺", "⢻", "⢼", "⢽", "⢾", "⢿", "⣀", "⣁", "⣂", "⣃", "⣄", "⣅", "⣆", "⣇", "⣈", "⣉", "⣊", "⣋", "⣌", "⣍", "⣎", "⣏", "⣐", "⣑", "⣒", "⣓", "⣔", "⣕", "⣖", "⣗", "⣘", "⣙", "⣚", "⣛", "⣜", "⣝", "⣞", "⣟", "⣠", "⣡", "⣢", "⣣", "⣤", "⣥", "⣦", "⣧", "⣨", "⣩", "⣪", "⣫", "⣬", "⣭", "⣮", "⣯", "⣰", "⣱", "⣲", "⣳", "⣴", "⣵", "⣶", "⣷", "⣸", "⣹", "⣺", "⣻", "⣼", "⣽", "⣾", "⣿"};
 	const int dotvalues[][4] = {{0x1, 0x2, 0x4, 0x40}, {0x8, 0x10, 0x20, 0x80}};
 
-	const char *const blocks[] = {" ", "▖", "▗", "▄", "▘", "▌", "▚", "▙", "▝", "▞", "▐", "▟", "▀", "▛", "▜", "█"};
-	const int blockvalues[][2] = {{4, 1}, {8, 2}};
+	const char *const blocks_quadrant[] = {" ", "▘", "▝", "▀", "▖", "▌", "▞", "▛", "▗", "▚", "▐", "▜", "▄", "▙", "▟", "█"};
+
+	const char *const separated_blocks_quadrant[] = {" ", "𜰡", "𜰢", "𜰣", "𜰤", "𜰥", "𜰦", "𜰧", "𜰨", "𜰩", "𜰪", "𜰫", "𜰬", "𜰭", "𜰮", "𜰯"};
+
+	const char *const blocks_sextant[] = {" ", "🬀", "🬁", "🬂", "🬃", "🬄", "🬅", "🬆", "🬇", "🬈", "🬉", "🬊", "🬋", "🬌", "🬍", "🬎", "🬏", "🬐", "🬑", "🬒", "🬓", "▌", "🬔", "🬕", "🬖", "🬗", "🬘", "🬙", "🬚", "🬛", "🬜", "🬝", "🬞", "🬟", "🬠", "🬡", "🬢", "🬣", "🬤", "🬥", "🬦", "🬧", "▐", "🬨", "🬩", "🬪", "🬫", "🬬", "🬭", "🬮", "🬯", "🬰", "🬱", "🬲", "🬳", "🬴", "🬵", "🬶", "🬷", "🬸", "🬹", "🬺", "🬻", "█"};
+
+	const char *const separated_blocks_sextant[] = {" ", "𜹑", "𜹒", "𜹓", "𜹔", "𜹕", "𜹖", "𜹗", "𜹘", "𜹙", "𜹚", "𜹛", "𜹜", "𜹝", "𜹞", "𜹟", "𜹠", "𜹡", "𜹢", "𜹣", "𜹤", "𜹥", "𜹦", "𜹧", "𜹨", "𜹩", "𜹪", "𜹫", "𜹬", "𜹭", "𜹮", "𜹯", "𜹰", "𜹱", "𜹲", "𜹳", "𜹴", "𜹵", "𜹶", "𜹷", "𜹸", "𜹹", "𜹺", "𜹻", "𜹼", "𜹽", "𜹾", "𜹿", "𜺀", "𜺁", "𜺂", "𜺃", "𜺄", "𜺅", "𜺆", "𜺇", "𜺈", "𜺉", "𜺊", "𜺋", "𜺌", "𜺍", "𜺎", "𜺏"};
+
+	const char *const blocks_octant[] = {" ", "𜺨", "𜺫", "🮂", "𜴀", "▘", "𜴁", "𜴂", "𜴃", "𜴄", "▝", "𜴅", "𜴆", "𜴇", "𜴈", "▀", "𜴉", "𜴊", "𜴋", "𜴌", "🯦", "𜴍", "𜴎", "𜴏", "𜴐", "𜴑", "𜴒", "𜴓", "𜴔", "𜴕", "𜴖", "𜴗", "𜴘", "𜴙", "𜴚", "𜴛", "𜴜", "𜴝", "𜴞", "𜴟", "🯧", "𜴠", "𜴡", "𜴢", "𜴣", "𜴤", "𜴥", "𜴦", "𜴧", "𜴨", "𜴩", "𜴪", "𜴫", "𜴬", "𜴭", "𜴮", "𜴯", "𜴰", "𜴱", "𜴲", "𜴳", "𜴴", "𜴵", "🮅", "𜺣", "𜴶", "𜴷", "𜴸", "𜴹", "𜴺", "𜴻", "𜴼", "𜴽", "𜴾", "𜴿", "𜵀", "𜵁", "𜵂", "𜵃", "𜵄", "▖", "𜵅", "𜵆", "𜵇", "𜵈", "▌", "𜵉", "𜵊", "𜵋", "𜵌", "▞", "𜵍", "𜵎", "𜵏", "𜵐", "▛", "𜵑", "𜵒", "𜵓", "𜵔", "𜵕", "𜵖", "𜵗", "𜵘", "𜵙", "𜵚", "𜵛", "𜵜", "𜵝", "𜵞", "𜵟", "𜵠", "𜵡", "𜵢", "𜵣", "𜵤", "𜵥", "𜵦", "𜵧", "𜵨", "𜵩", "𜵪", "𜵫", "𜵬", "𜵭", "𜵮", "𜵯", "𜵰", "𜺠", "𜵱", "𜵲", "𜵳", "𜵴", "𜵵", "𜵶", "𜵷", "𜵸", "𜵹", "𜵺", "𜵻", "𜵼", "𜵽", "𜵾", "𜵿", "𜶀", "𜶁", "𜶂", "𜶃", "𜶄", "𜶅", "𜶆", "𜶇", "𜶈", "𜶉", "𜶊", "𜶋", "𜶌", "𜶍", "𜶎", "𜶏", "▗", "𜶐", "𜶑", "𜶒", "𜶓", "▚", "𜶔", "𜶕", "𜶖", "𜶗", "▐", "𜶘", "𜶙", "𜶚", "𜶛", "▜", "𜶜", "𜶝", "𜶞", "𜶟", "𜶠", "𜶡", "𜶢", "𜶣", "𜶤", "𜶥", "𜶦", "𜶧", "𜶨", "𜶩", "𜶪", "𜶫", "▂", "𜶬", "𜶭", "𜶮", "𜶯", "𜶰", "𜶱", "𜶲", "𜶳", "𜶴", "𜶵", "𜶶", "𜶷", "𜶸", "𜶹", "𜶺", "𜶻", "𜶼", "𜶽", "𜶾", "𜶿", "𜷀", "𜷁", "𜷂", "𜷃", "𜷄", "𜷅", "𜷆", "𜷇", "𜷈", "𜷉", "𜷊", "𜷋", "𜷌", "𜷍", "𜷎", "𜷏", "𜷐", "𜷑", "𜷒", "𜷓", "𜷔", "𜷕", "𜷖", "𜷗", "𜷘", "𜷙", "𜷚", "▄", "𜷛", "𜷜", "𜷝", "𜷞", "▙", "𜷟", "𜷠", "𜷡", "𜷢", "▟", "𜷣", "▆", "𜷤", "𜷥", "█"};
 
 	const char *const bars[] = {" ", "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█"};
 
 	enum type_type
 	{
 		type_braille,
-		type_block,
+		type_block_quadrant,
+		type_separated_block_quadrant,
+		type_block_sextant,
+		type_separated_block_sextant,
+		type_block_octant,
 		type_histogram // Set automatically by the histogram() function
 	};
 
-	enum type_type const type_types[] = {type_braille, type_block /* , type_histogram */};
+	enum type_type const type_types[] = {type_braille, type_block_quadrant, type_separated_block_quadrant, type_block_sextant, type_separated_block_sextant, type_block_octant /* , type_histogram */};
+
+	const unsigned short densities[][2] = {{4, 2}, {2, 2}, {2, 2}, {3, 2}, {3, 2}, {4, 2}, {8, 1}};
 
 	enum plot_type
 	{
@@ -104,7 +117,7 @@ namespace graphs
 
 	enum plot_type const plot_types[] = {plot_scatter, plot_line};
 
-	const short marks[][8][2] = {{{0, 0}}, {{0, 1}, {-1, 0}, {0, 0}, {1, 0}, {0, -1}}, {{-1, 1}, {0, 1}, {1, 1}, {-1, 0}, {1, 0}, {-1, -1}, {0, -1}, {1, -1}}};
+	const vector<vector<pair<short, short>>> marks = {{{0, 0}}, {{0, 1}, {-1, 0}, {0, 0}, {1, 0}, {0, -1}}, {{-1, 1}, {0, 1}, {1, 1}, {-1, 0}, {1, 0}, {-1, -1}, {0, -1}, {1, -1}}};
 
 	enum mark_type
 	{
@@ -378,8 +391,9 @@ namespace graphs
 			strm << number;
 	}
 
-	inline size_t outputlabel(const long double label, const units_type units, ostringstream &strm)
+	inline size_t outputlabel(const long double label, const units_type units, string &str)
 	{
+		ostringstream strm;
 		strm.imbue(locale(""));
 
 		switch (units)
@@ -420,11 +434,21 @@ namespace graphs
 			break;
 		}
 
-		const size_t length = strcol(strm.str());
+		str = strm.str();
+		const size_t length = strcol(str);
 
 		return length;
 	}
 
+	inline string outputcolor(const color_type color)
+	{
+		ostringstream strm;
+
+		strm << "\e[" << int(colors[color]) << "m";
+
+		return strm.str();
+	}
+
 	// Output graph
 	inline int graph(const size_t height, const size_t width, const long double xmin, const long double xmax, const long double ymin, const long double ymax, const vector<vector<unsigned short>> &array, const options &aoptions)
 	{
@@ -437,7 +461,6 @@ namespace graphs
 		const bool axistick = aoptions.axistick;
 		const bool axisunitslabel = aoptions.axisunitslabel;
 		const type_type type = aoptions.type;
-		const char *const title = aoptions.title;
 
 		if (!height)
 			return 1;
@@ -448,9 +471,7 @@ namespace graphs
 		struct winsize w;
 		ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
 
-		const size_t ai = type == type_histogram ? 8 : type == type_block ? 2
-																		  : 4;
-		const size_t aj = type == type_histogram ? 1 : 2;
+		const auto [ai, aj] = densities[type];
 
 		const size_t aheight = height / ai;
 		const size_t awidth = width / aj;
@@ -493,8 +514,8 @@ namespace graphs
 
 		setlocale(LC_ALL, "");
 
-		if (title and title[0] != '\0')
-			aoptions.ostr << wrap(title, awidth) << '\n';
+		if (aoptions.title and aoptions.title[0] != '\0')
+			aoptions.ostr << wrap(aoptions.title, awidth) << '\n';
 
 		const char *const *astyle = styles[aoptions.style];
 
@@ -515,7 +536,7 @@ namespace graphs
 			const bool ayaxis = yaxis <= (height - ai) ? i <= yaxis and (i + ai) > yaxis : i < yaxis and (i + ai) >= yaxis;
 			const bool yaxislabel = yaxis <= (height - ai) ? i <= (yaxis + ai) and (i + ai) > (yaxis + ai) : i < (yaxis - ai) and (i + ai) >= (yaxis - ai);
 
-			ostringstream ylabelstrm;
+			string ylabelstr;
 			size_t ylabellength = 0;
 
 			if (axis and axistick and axisunitslabel and yaxis >= 0 and yaxis <= height)
@@ -536,7 +557,7 @@ namespace graphs
 
 				if (output)
 				{
-					ylabellength = outputlabel(label, aoptions.yunits, ylabelstrm);
+					ylabellength = outputlabel(label, aoptions.yunits, ylabelstr);
 					ylabellength *= aj;
 				}
 			}
@@ -654,12 +675,12 @@ namespace graphs
 						{
 							output = false;
 
-							ostringstream astrm;
-							size_t length = outputlabel(label, aoptions.xunits, astrm);
+							string astr;
+							size_t length = outputlabel(label, aoptions.xunits, astr);
 							length *= aj;
 							if ((j >= xaxis or (j + length) < (ymin <= 0 and ymax >= 0 and xmin <= 0 and xmax >= 0 ? xaxis - ai : xaxis)) and (j + length) < (width - aj) and (xaxis <= (width - aj) or j > aj))
 							{
-								strm << astrm.str();
+								strm << astr;
 
 								if (length > aj)
 									j += length - aj;
@@ -678,7 +699,7 @@ namespace graphs
 					}
 					else if (ylabellength and (xaxis < aj ? xaxislabel : j < (xaxis - ylabellength) and (j + aj) >= (xaxis - ylabellength)) and (yaxis >= ai or i < (height - ai)) and axistick and axisunitslabel)
 					{
-						strm << ylabelstrm.str();
+						strm << ylabelstr;
 						output = true;
 						if (ylabellength > aj)
 							j += ylabellength - aj;
@@ -697,15 +718,23 @@ namespace graphs
 							const unsigned short value = array[j + k][i + l];
 							if (value)
 							{
-								if (type == type_histogram)
+								switch (type)
 								{
+								case type_braille:
+									dot += dotvalues[k][l];
+									break;
+								case type_block_quadrant:
+								case type_separated_block_quadrant:
+								case type_block_sextant:
+								case type_separated_block_sextant:
+								case type_block_octant:
+									dot += 1 << (l * aj + k);
+									break;
+								case type_histogram:
 									if (!dot)
 										dot = (size(bars) - l) - 1;
+									break;
 								}
-								else if (type == type_block)
-									dot += blockvalues[k][l];
-								else
-									dot += dotvalues[k][l];
 							}
 							if (color)
 							{
@@ -721,13 +750,35 @@ namespace graphs
 						--color;
 
 					if (color)
-						strm << colors[color];
+						strm << outputcolor(color_type(color));
 
-					strm << (type == type_histogram ? bars[dot] : type == type_block ? blocks[dot]
-																					 : dots[dot]);
+					switch (type)
+					{
+					case type_braille:
+						strm << dots[dot];
+						break;
+					case type_block_quadrant:
+						strm << blocks_quadrant[dot];
+						break;
+					case type_separated_block_quadrant:
+						strm << separated_blocks_quadrant[dot];
+						break;
+					case type_block_sextant:
+						strm << blocks_sextant[dot];
+						break;
+					case type_separated_block_sextant:
+						strm << separated_blocks_sextant[dot];
+						break;
+					case type_block_octant:
+						strm << blocks_octant[dot];
+						break;
+					case type_histogram:
+						strm << bars[dot];
+						break;
+					}
 
 					if (color)
-						strm << colors[0];
+						strm << outputcolor(color_default);
 				}
 			}
 
@@ -766,31 +817,30 @@ namespace graphs
 		ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
 
 		if (!height)
-			height = w.ws_row * 4;
+			height = w.ws_row;
 
 		if (!width)
-			width = w.ws_col * 2;
+			width = w.ws_col;
 
 		if (aoptions.check)
 		{
-			const size_t aheight = height / 4;
-			const size_t awidth = width / 2;
-
-			if (aheight > w.ws_row)
+			if (height > w.ws_row)
 			{
-				cerr << "The height of the graph (" << aheight << ") is greater then the height of the terminal (" << w.ws_row << ").\n";
+				cerr << "The height of the graph (" << height << ") is greater then the height of the terminal (" << w.ws_row << ").\n";
 				return 1;
 			}
 
-			if (awidth > w.ws_col)
+			if (width > w.ws_col)
 			{
-				cerr << "The width of the graph (" << awidth << ") is greater then the width of the terminal (" << w.ws_col << ").\n";
+				cerr << "The width of the graph (" << width << ") is greater then the width of the terminal (" << w.ws_col << ").\n";
 				return 1;
 			}
 		}
 
-		height *= 2;
-		width /= 2;
+		const auto [ai, aj] = densities[type_histogram];
+
+		height *= ai;
+		width *= aj;
 
 		if (!xmin and !xmax)
 		{
@@ -890,31 +940,30 @@ namespace graphs
 		ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
 
 		if (!height)
-			height = w.ws_row * 4;
+			height = w.ws_row;
 
 		if (!width)
-			width = w.ws_col * 2;
+			width = w.ws_col;
 
 		if (aoptions.check)
 		{
-			const size_t aheight = height / 4;
-			const size_t awidth = width / 2;
-
-			if (aheight > w.ws_row)
+			if (height > w.ws_row)
 			{
-				cerr << "The height of the graph (" << aheight << ") is greater then the height of the terminal (" << w.ws_row << ").\n";
+				cerr << "The height of the graph (" << height << ") is greater then the height of the terminal (" << w.ws_row << ").\n";
 				return 1;
 			}
 
-			if (awidth > w.ws_col)
+			if (width > w.ws_col)
 			{
-				cerr << "The width of the graph (" << awidth << ") is greater then the width of the terminal (" << w.ws_col << ").\n";
+				cerr << "The width of the graph (" << width << ") is greater then the width of the terminal (" << w.ws_col << ").\n";
 				return 1;
 			}
 		}
 
-		if (aoptions.type == type_block)
-			height /= 2;
+		const auto [ai, aj] = densities[aoptions.type];
+
+		height *= ai;
+		width *= aj;
 
 		if (!xmin and !xmax)
 		{
@@ -1029,31 +1078,30 @@ namespace graphs
 		ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
 
 		if (!height)
-			height = w.ws_row * 4;
+			height = w.ws_row;
 
 		if (!width)
-			width = w.ws_col * 2;
+			width = w.ws_col;
 
 		if (aoptions.check)
 		{
-			const size_t aheight = height / 4;
-			const size_t awidth = width / 2;
-
-			if (aheight > w.ws_row)
+			if (height > w.ws_row)
 			{
-				cerr << "The height of the graph (" << aheight << ") is greater then the height of the terminal (" << w.ws_row << ").\n";
+				cerr << "The height of the graph (" << height << ") is greater then the height of the terminal (" << w.ws_row << ").\n";
 				return 1;
 			}
 
-			if (awidth > w.ws_col)
+			if (width > w.ws_col)
 			{
-				cerr << "The width of the graph (" << awidth << ") is greater then the width of the terminal (" << w.ws_col << ").\n";
+				cerr << "The width of the graph (" << width << ") is greater then the width of the terminal (" << w.ws_col << ").\n";
 				return 1;
 			}
 		}
 
-		if (aoptions.type == type_block)
-			height /= 2;
+		const auto [ai, aj] = densities[aoptions.type];
+
+		height *= ai;
+		width *= aj;
 
 		if (xmin >= xmax)
 		{
diff --git a/python/README.md b/python/README.md
index 9e193ed..b940813 100644
--- a/python/README.md
+++ b/python/README.md
@@ -273,15 +273,15 @@ Complete versions of all of the examples below and more can be found in the [tes
 
 Run with: `python3 -OO test.py`.
 
-If `height` is `0`, it will be set to the current height of the terminal (number of rows times four). If `width` is `0`, it will be set to the current width of the terminal (number of columns times two).
+If `height` is `0`, it will be set to the current height of the terminal (number of rows). If `width` is `0`, it will be set to the current width of the terminal (number of columns).
 
 #### Output array as histogram
 
 ```py
 import graphs
 
-height = 160
-width = 160
+height = 40
+width = 80
 
 xmin = -20
 xmax = 20
@@ -302,8 +302,8 @@ If `xmin` and `xmax` are both `0`, they will be set to the respective minimum an
 ```py
 import graphs
 
-height = 160
-width = 160
+height = 40
+width = 80
 
 xmin = -20
 xmax = 20
@@ -329,8 +329,8 @@ import graphs
 def afunction(x):
 	return x + 1
 
-height = 160
-width = 160
+height = 40
+width = 80
 
 xmin = -20
 xmax = 20
@@ -347,8 +347,8 @@ graphs.function(height, width, xmin, xmax, ymin, ymax, afunction)
 ```py
 import graphs
 
-height = 160
-width = 160
+height = 40
+width = 80
 
 xmin = -20
 xmax = 20
@@ -373,8 +373,8 @@ def function1(x):
 def function2(x):
 	return x ** 2
 
-height = 160
-width = 160
+height = 40
+width = 80
 
 xmin = -20
 xmax = 20
@@ -394,8 +394,8 @@ graphs.functions(height, width, xmin, xmax, ymin, ymax, functions)
 ```py
 import graphs
 
-height = 160
-width = 160
+height = 40
+width = 80
 
 xmin = -20
 xmax = 20
@@ -473,10 +473,16 @@ Values:
 
 1. `type_types.braille`: Braille (default)
 	![](../images/type%20braille%20graph.png)
-2. `type_types.block`: Block
+2. `type_types.block_quadrant`: Block quadrant
 	![](../images/type%20block%20graph.png)
+3. `type_types.separated_block_quadrant`: Separated block quadrant
+4. `type_types.block_sextant`: Block sextant
+5. `type_types.separated_block_sextant`: Separated block sextant
+6. `type_types.block_octant`: Block octant
 
-The Braille type has the highest resolution of 2×4 pixels per character, while the block type uses 2×2. This option is only used for plots and graphs. Histograms use 1×8 pixels per character.
+The Braille and block octant types have the highest density of 2×4 pixels per character, while the two block sextant types use 2×3 and the two block quadrant types use 2×2. This option is only used for plots and graphs. Histograms use 1×8 pixels per character.
+
+The block sextant type requires support for Unicode 13.0, while the separated block quadrant, separated block sextant and block octant types require support for Unicode 16.0.
 
 #### Mark type
 
diff --git a/python/graphs.py b/python/graphs.py
index 6f94d1c..07cb153 100644
--- a/python/graphs.py
+++ b/python/graphs.py
@@ -74,10 +74,7 @@ class color_types(IntEnum):
 	bright_white = auto()
 
 
-colors = ("\033[39m", "\033[30m", "\033[31m", "\033[32m", "\033[33m",
-		  "\033[34m", "\033[35m", "\033[36m", "\033[37m", "\033[90m",
-		  "\033[91m", "\033[92m", "\033[93m", "\033[94m", "\033[95m",
-		  "\033[96m", "\033[97m")
+colors = (39, 30, 31, 32, 33, 34, 35, 36, 37, 90, 91, 92, 93, 94, 95, 96, 97)
 
 dots = (
 	"⠀", "⠁", "⠂", "⠃", "⠄", "⠅", "⠆", "⠇", "⠈", "⠉", "⠊", "⠋", "⠌", "⠍", "⠎",
@@ -100,19 +97,31 @@ class color_types(IntEnum):
 	"⣿")
 dotvalues = ((0x1, 0x2, 0x4, 0x40), (0x8, 0x10, 0x20, 0x80))
 
-blocks = (" ", "▖", "▗", "▄", "▘", "▌", "▚",
-		  "▙", "▝", "▞", "▐", "▟", "▀", "▛", "▜", "█")
-blockvalues = ((4, 1), (8, 2))
+blocks_quadrant = (" ", "▘", "▝", "▀", "▖", "▌", "▞", "▛", "▗", "▚", "▐", "▜", "▄", "▙", "▟", "█")
+
+separated_blocks_quadrant = (" ", "𜰡", "𜰢", "𜰣", "𜰤", "𜰥", "𜰦", "𜰧", "𜰨", "𜰩", "𜰪", "𜰫", "𜰬", "𜰭", "𜰮", "𜰯")
+
+blocks_sextant = (" ", "🬀", "🬁", "🬂", "🬃", "🬄", "🬅", "🬆", "🬇", "🬈", "🬉", "🬊", "🬋", "🬌", "🬍", "🬎", "🬏", "🬐", "🬑", "🬒", "🬓", "▌", "🬔", "🬕", "🬖", "🬗", "🬘", "🬙", "🬚", "🬛", "🬜", "🬝", "🬞", "🬟", "🬠", "🬡", "🬢", "🬣", "🬤", "🬥", "🬦", "🬧", "▐", "🬨", "🬩", "🬪", "🬫", "🬬", "🬭", "🬮", "🬯", "🬰", "🬱", "🬲", "🬳", "🬴", "🬵", "🬶", "🬷", "🬸", "🬹", "🬺", "🬻", "█")
+
+separated_blocks_sextant = (" ", "𜹑", "𜹒", "𜹓", "𜹔", "𜹕", "𜹖", "𜹗", "𜹘", "𜹙", "𜹚", "𜹛", "𜹜", "𜹝", "𜹞", "𜹟", "𜹠", "𜹡", "𜹢", "𜹣", "𜹤", "𜹥", "𜹦", "𜹧", "𜹨", "𜹩", "𜹪", "𜹫", "𜹬", "𜹭", "𜹮", "𜹯", "𜹰", "𜹱", "𜹲", "𜹳", "𜹴", "𜹵", "𜹶", "𜹷", "𜹸", "𜹹", "𜹺", "𜹻", "𜹼", "𜹽", "𜹾", "𜹿", "𜺀", "𜺁", "𜺂", "𜺃", "𜺄", "𜺅", "𜺆", "𜺇", "𜺈", "𜺉", "𜺊", "𜺋", "𜺌", "𜺍", "𜺎", "𜺏")
+
+blocks_octant = (" ", "𜺨", "𜺫", "🮂", "𜴀", "▘", "𜴁", "𜴂", "𜴃", "𜴄", "▝", "𜴅", "𜴆", "𜴇", "𜴈", "▀", "𜴉", "𜴊", "𜴋", "𜴌", "🯦", "𜴍", "𜴎", "𜴏", "𜴐", "𜴑", "𜴒", "𜴓", "𜴔", "𜴕", "𜴖", "𜴗", "𜴘", "𜴙", "𜴚", "𜴛", "𜴜", "𜴝", "𜴞", "𜴟", "🯧", "𜴠", "𜴡", "𜴢", "𜴣", "𜴤", "𜴥", "𜴦", "𜴧", "𜴨", "𜴩", "𜴪", "𜴫", "𜴬", "𜴭", "𜴮", "𜴯", "𜴰", "𜴱", "𜴲", "𜴳", "𜴴", "𜴵", "🮅", "𜺣", "𜴶", "𜴷", "𜴸", "𜴹", "𜴺", "𜴻", "𜴼", "𜴽", "𜴾", "𜴿", "𜵀", "𜵁", "𜵂", "𜵃", "𜵄", "▖", "𜵅", "𜵆", "𜵇", "𜵈", "▌", "𜵉", "𜵊", "𜵋", "𜵌", "▞", "𜵍", "𜵎", "𜵏", "𜵐", "▛", "𜵑", "𜵒", "𜵓", "𜵔", "𜵕", "𜵖", "𜵗", "𜵘", "𜵙", "𜵚", "𜵛", "𜵜", "𜵝", "𜵞", "𜵟", "𜵠", "𜵡", "𜵢", "𜵣", "𜵤", "𜵥", "𜵦", "𜵧", "𜵨", "𜵩", "𜵪", "𜵫", "𜵬", "𜵭", "𜵮", "𜵯", "𜵰", "𜺠", "𜵱", "𜵲", "𜵳", "𜵴", "𜵵", "𜵶", "𜵷", "𜵸", "𜵹", "𜵺", "𜵻", "𜵼", "𜵽", "𜵾", "𜵿", "𜶀", "𜶁", "𜶂", "𜶃", "𜶄", "𜶅", "𜶆", "𜶇", "𜶈", "𜶉", "𜶊", "𜶋", "𜶌", "𜶍", "𜶎", "𜶏", "▗", "𜶐", "𜶑", "𜶒", "𜶓", "▚", "𜶔", "𜶕", "𜶖", "𜶗", "▐", "𜶘", "𜶙", "𜶚", "𜶛", "▜", "𜶜", "𜶝", "𜶞", "𜶟", "𜶠", "𜶡", "𜶢", "𜶣", "𜶤", "𜶥", "𜶦", "𜶧", "𜶨", "𜶩", "𜶪", "𜶫", "▂", "𜶬", "𜶭", "𜶮", "𜶯", "𜶰", "𜶱", "𜶲", "𜶳", "𜶴", "𜶵", "𜶶", "𜶷", "𜶸", "𜶹", "𜶺", "𜶻", "𜶼", "𜶽", "𜶾", "𜶿", "𜷀", "𜷁", "𜷂", "𜷃", "𜷄", "𜷅", "𜷆", "𜷇", "𜷈", "𜷉", "𜷊", "𜷋", "𜷌", "𜷍", "𜷎", "𜷏", "𜷐", "𜷑", "𜷒", "𜷓", "𜷔", "𜷕", "𜷖", "𜷗", "𜷘", "𜷙", "𜷚", "▄", "𜷛", "𜷜", "𜷝", "𜷞", "▙", "𜷟", "𜷠", "𜷡", "𜷢", "▟", "𜷣", "▆", "𜷤", "𜷥", "█")
 
 bars = (" ", "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█")
 
 
 class type_types(IntEnum):
 	braille = 0
-	block = auto()
+	block_quadrant = auto()
+	separated_block_quadrant = auto()
+	block_sextant = auto()
+	separated_block_sextant = auto()
+	block_octant = auto()
 	histogram = auto() # Set automatically by the histogram() function
 
-atype_types = (type_types.braille, type_types.block)
+atype_types = (type_types.braille, type_types.block_quadrant, type_types.separated_block_quadrant, type_types.block_sextant, type_types.separated_block_sextant, type_types.block_octant)
+
+densities = ((4, 2), (2, 2), (2, 2), (3, 2), (3, 2), (4, 2), (8, 1))
 
 marks = (((0, 0),), ((0, 1), (-1, 0), (0, 0), (1, 0), (0, -1)),
 		 ((-1, 1), (0, 1), (1, 1), (-1, 0), (1, 0), (-1, -1), (0, -1), (1, -1)))
@@ -298,6 +307,10 @@ def outputlabel(label: float, units: units_types) -> Tuple[int, str]:
 	return length, strm
 
 
+def outputcolor(color: color_types) -> str:
+	return f"\033[{colors[color]}m"
+
+
 def graph(height: int, width: int, xmin: float, xmax: float, ymin: float, ymax: float, array: List[List[int]], border: bool = False, axis: bool = True, axislabel: bool = True, axistick: bool = True, axisunitslabel: bool = True, xunits: units_types = units_types.fracts, yunits: units_types = units_types.fracts, atype: type_types = type_types.braille, style: style_types = style_types.light, title: Optional[str] = None, file: TextIO = sys.stdout, check: bool = True) -> int:
 	"""Output graph."""
 	if not array:
@@ -311,8 +324,7 @@ def graph(height: int, width: int, xmin: float, xmax: float, ymin: float, ymax:
 
 	w = shutil.get_terminal_size()
 
-	ai = 8 if atype == type_types.histogram else 2 if atype == type_types.block else 4
-	aj = 1 if atype == type_types.histogram else 2
+	ai, aj = densities[atype]
 
 	aheight = height // ai
 	awidth = width // aj
@@ -485,13 +497,13 @@ def graph(height: int, width: int, xmin: float, xmax: float, ymin: float, ymax:
 					for l in range(min(ai, height - i)):
 						value = array[j + k][i + l]
 						if value:
-							if atype == type_types.histogram:
+							if atype == type_types.braille:
+								dot += dotvalues[k][l]
+							elif atype in {type_types.block_quadrant, type_types.separated_block_quadrant, type_types.block_sextant, type_types.separated_block_sextant, type_types.block_octant}:
+								dot += 1 << (l * aj + k)
+							elif atype == type_types.histogram:
 								if not dot:
 									dot = (len(bars) - l) - 1
-							elif atype == type_types.block:
-								dot += blockvalues[k][l]
-							else:
-								dot += dotvalues[k][l]
 						if color:
 							if value and color != value:
 								color = 1
@@ -502,12 +514,25 @@ def graph(height: int, width: int, xmin: float, xmax: float, ymin: float, ymax:
 					color -= 1
 
 				if color:
-					strm += colors[color]
-
-				strm += bars[dot] if atype == type_types.histogram else blocks[dot] if atype == type_types.block else dots[dot]
+					strm += outputcolor(color)
+
+				if atype == type_types.braille:
+					strm += dots[dot]
+				elif atype == type_types.block_quadrant:
+					strm += blocks_quadrant[dot]
+				elif atype == type_types.separated_block_quadrant:
+					strm += separated_blocks_quadrant[dot]
+				elif atype == type_types.block_sextant:
+					strm += blocks_sextant[dot]
+				elif atype == type_types.separated_block_sextant:
+					strm += separated_blocks_sextant[dot]
+				elif atype == type_types.block_octant:
+					strm += blocks_octant[dot]
+				elif atype == type_types.histogram:
+					strm += bars[dot]
 
 				if color:
-					strm += colors[0]
+					strm += outputcolor(color_types.default)
 
 			j += aj
 
@@ -534,27 +559,26 @@ def histogram(height: int, width: int, xmin: float, xmax: float, ymin: float, ym
 	w = shutil.get_terminal_size()
 
 	if not height:
-		height = w.lines * 4
+		height = w.lines
 
 	if not width:
-		width = w.columns * 2
+		width = w.columns
 
 	if check:
-		aheight = height // 4
-		awidth = width // 2
-
-		if aheight > w.lines:
+		if height > w.lines:
 			print(
-				f"The height of the graph ({aheight}) is greater then the height of the terminal ({w.lines}).", file=sys.stderr)
+				f"The height of the graph ({height}) is greater then the height of the terminal ({w.lines}).", file=sys.stderr)
 			return 1
 
-		if awidth > w.columns:
+		if width > w.columns:
 			print(
-				f"The width of the graph ({awidth}) is greater then the width of the terminal ({w.columns}).", file=sys.stderr)
+				f"The width of the graph ({width}) is greater then the width of the terminal ({w.columns}).", file=sys.stderr)
 			return 1
 
-	height *= 2
-	width //= 2
+	ai, aj = densities[type_types.histogram]
+
+	height *= ai
+	width *= aj
 
 	if not xmin and not xmax:
 		xmin = min(aarray)
@@ -609,27 +633,26 @@ def plots(height: int, width: int, xmin: float, xmax: float, ymin: float, ymax:
 	w = shutil.get_terminal_size()
 
 	if not height:
-		height = w.lines * 4
+		height = w.lines
 
 	if not width:
-		width = w.columns * 2
+		width = w.columns
 
 	if check:
-		aheight = height // 4
-		awidth = width // 2
-
-		if aheight > w.lines:
+		if height > w.lines:
 			print(
-				f"The height of the graph ({aheight}) is greater then the height of the terminal ({w.lines}).", file=sys.stderr)
+				f"The height of the graph ({height}) is greater then the height of the terminal ({w.lines}).", file=sys.stderr)
 			return 1
 
-		if awidth > w.columns:
+		if width > w.columns:
 			print(
-				f"The width of the graph ({awidth}) is greater then the width of the terminal ({w.columns}).", file=sys.stderr)
+				f"The width of the graph ({width}) is greater then the width of the terminal ({w.columns}).", file=sys.stderr)
 			return 1
 
-	if atype == type_types.block:
-		height //= 2
+	ai, aj = densities[atype]
+
+	height *= ai
+	width *= aj
 
 	if not xmin and not xmax:
 		xmin = min(x for aarray in aarrays for x, y in aarray)
@@ -689,27 +712,26 @@ def functions(height: int, width: int, xmin: float, xmax: float, ymin: float, ym
 	w = shutil.get_terminal_size()
 
 	if not height:
-		height = w.lines * 4
+		height = w.lines
 
 	if not width:
-		width = w.columns * 2
+		width = w.columns
 
 	if check:
-		aheight = height // 4
-		awidth = width // 2
-
-		if aheight > w.lines:
+		if height > w.lines:
 			print(
-				f"The height of the graph ({aheight}) is greater then the height of the terminal ({w.lines}).", file=sys.stderr)
+				f"The height of the graph ({height}) is greater then the height of the terminal ({w.lines}).", file=sys.stderr)
 			return 1
 
-		if awidth > w.columns:
+		if height > w.columns:
 			print(
-				f"The width of the graph ({awidth}) is greater then the width of the terminal ({w.columns}).", file=sys.stderr)
+				f"The width of the graph ({height}) is greater then the width of the terminal ({w.columns}).", file=sys.stderr)
 			return 1
 
-	if atype == type_types.block:
-		height //= 2
+	ai, aj = densities[atype]
+
+	height *= ai
+	width *= aj
 
 	if xmin >= xmax:
 		print("xmin must be less than xmax.", file=sys.stderr)
diff --git a/python/test.py b/python/test.py
index 5825cf5..64c58df 100644
--- a/python/test.py
+++ b/python/test.py
@@ -107,8 +107,8 @@ def function2(x: float) -> float:
 	tables.functions(xmin, xmax, xstep, [
 		lambda x: 2 * x, lambda x: x ** 2], headerrow=True, style=style)
 
-height = 160
-width = 160
+height = 40
+width = 80
 
 xmin = -20
 xmax = 20