Add caveats for shifted characters (qmk#4192)

* Add caveats for shifted characters

And some formatting and grammar corrections.

Closes qmk#1037

* Fix spelling of remote

* Fix spelling error

* Remote not Remove

* Remote not Remove

docs/feature_advanced_keycodes.md

@@ -2,7 +2,7 @@
 
 Your keymap can include keycodes that are more advanced than normal, for example keys that switch layers or send modifiers when held, but send regular keycodes when tapped. This page documents the functions that are available to you.
 
-### Assigning Custom Names
+## Assigning Custom Names
 
 People often define custom names using `#define`. For example:
 
@@ -13,7 +13,7 @@ People often define custom names using `#define`. For example:
 
 This will allow you to use `FN_CAPS` and `ALT_TAB` in your `KEYMAP()`, keeping it more readable.
 
-### Caveats
+## Caveats
 
 Currently, `LT()` and `MT()` are limited to the [Basic Keycode set](keycodes_basic.md), meaning you can't use keycodes like `LCTL()`, `KC_TILD`, or anything greater than `0xFF`. Modifiers specified as part of a Layer Tap or Mod Tap's keycode will be ignored.
 
@@ -36,19 +36,19 @@ These functions allow you to activate layers in various ways. Note that layers a
 
 Care must be taken when switching layers, it's possible to lock yourself into a layer with no way to deactivate that layer (without unplugging your keyboard.) We've created some guidelines to help users avoid the most common problems.
 
-### Beginners
+## Beginners
 
 If you are just getting started with QMK you will want to keep everything simple. Follow these guidelines when setting up your layers:
 
 * Setup layer 0 as your default, "base" layer. This is your normal typing layer, and could be whatever layout you want (qwerty, dvorak, colemak, etc.). It's important to set this as the lowest layer since it will typically have most or all of the keyboard's keys defined, so would block other layers from having any effect if it were above them (i.e., had a higher layer number). 
 * Arrange your layers in a "tree" layout, with layer 0 as the root. Do not try to enter the same layer from more than one other layer.
 * In a layer's keymap, only reference higher-numbered layers. Because layers are processed from the highest-numbered (topmost) active layer down, modifying the state of lower layers can be tricky and error-prone.
 
-### Intermediate Users
+## Intermediate Users
 
 Sometimes you need more than one base layer. For example, if you want to switch between QWERTY and Dvorak, switch between layouts for different countries, or switch your layout for different videogames. Your base layers should always be the lowest numbered layers. When you have multiple base layers you should always treat them as mutually exclusive. When one base layer is on the others are off.
 
-### Advanced Users
+## Advanced Users
 
 Once you have a good feel for how layers work and what you can do, you can get more creative. The rules listed in the beginner section will help you be successful by avoiding some of the tricker details but they can be constraining, especially for ultra-compact keyboard users. Understanding how layers work will allow you to use them in more advanced ways.
 
@@ -126,6 +126,14 @@ For convenience, QMK includes some Mod-Tap shortcuts to make common combinations
 |`SGUI_T(kc)`|`SCMD_T(kc)`, `SWIN_T(kc)`             |Left Shift and GUI when held, `kc` when tapped         |
 |`LCA_T(kc)` |                                       |Left Control and Alt when held, `kc` when tapped       |
 
+## Caveats
+
+Unfortunately, these keycodes cannot be used in Mod-Taps or Layer-Taps, since any modifiers specified in the keycode are ignored.
+
+Additionally, you may run into issues when using Remote Desktop Connection on Windows. Because these codes send shift very fast, Remote Desktop may miss the codes.
+
+To fix this, open Remote Desktop Connection, click on "Show Options", open the the "Local Resources" tab. In the keyboard section, change the drop down to "On this Computer". This will fix the issue, and allow the characters to work correctly.
+
 # One Shot Keys
 
 One shot keys are keys that remain active until the next key is pressed, and then are released. This allows you to type keyboard combinations without pressing more than one key at a time. These keys are usually called "Sticky keys" or "Dead keys".
@@ -146,7 +154,7 @@ You can control the behavior of one shot keys by defining these in `config.h`:
 
 Sometimes, you want to activate a one-shot layer as part of a macro or tap dance routine. To do this, you need to call `set_oneshot_layer(LAYER, ONESHOT_START)` on key down, and `set_oneshot_layer(ONESHOT_PRESSED)` on key up. If you want to cancel the oneshot, call `reset_oneshot_layer()`. For more complicated actions, take a look at the oneshot implementation in [`process_record`](https://github.com/qmk/qmk_firmware/blob/master/tmk_core/common/action.c#L429).
 
-If you're having issues with OSM translating over Remote Desktop Connection, this can be fixed by opening the settings, going to the "Local Resources" tap, and in the keyboard section, change the drop down to "On this Computer".  This will fix the issue and allow OSM to function properly over Remote Desktop.
+If you're having issues with OSM translating over Remote Desktop Connection, this can be fixed by clicking on "Show Options", going to the "Local Resources" tab, and in the keyboard section, change the drop down to "On this Computer".  This will fix the issue and allow OSM to function properly over Remote Desktop.
 
 # Permissive Hold
 

docs/keycodes_us_ansi_shifted.md

@@ -6,6 +6,10 @@ These keycodes correspond to characters that are "shifted" on a standard US ANSI
 
 Unfortunately, these keycodes cannot be used in Mod-Taps or Layer-Taps, since any modifiers specified in the keycode are ignored.
 
+Additionally, you may run into issues when using Remote Desktop Connection on Windows. Because these codes send shift very fast, Remote Desktop may miss the codes.
+
+To fix this, open Remote Desktop Connection, click on "Show Options", open the the "Local Resources" tab. In the keyboard section, change the drop down to "On this Computer". This will fix the issue, and allow the characters to work correctly.
+
 ## Keycodes
 
 |Key                     |Aliases            |Description        |