More documentation and better method/class modifiers

src/Askaiser.Marionette/DriverOptions.cs

@@ -57,6 +57,8 @@ public string FailureScreenshotPath
         }
 
         /// <summary>
+        /// Gets or sets how long previous screenshot bytes will be reused in subsequent searches. The cache will be evicted if the current monitor is changed.
+        /// It can be useful when searching for multiple elements at the same time, but it can also make the driver miss some frames.
         /// Default value: 100 milliseconds.
         /// </summary>
         public TimeSpan ScreenshotCacheDuration
@@ -66,6 +68,7 @@ public TimeSpan ScreenshotCacheDuration
         }
 
         /// <summary>
+        /// When an element is not found and the driver is allowed to try again to find it, it will wait for this specific duration before retrying.
         /// Default value: 50 milliseconds.
         /// </summary>
         public TimeSpan WaitForThrottlingInterval

src/Askaiser.Marionette/MatExtensions.cs

@@ -3,9 +3,9 @@
 
 namespace Askaiser.Marionette
 {
-    public static class MatExtensions
+    internal static class MatExtensions
     {
-        internal static Mat ToGrayscale(this Mat mat)
+        public static Mat ToGrayscale(this Mat mat)
         {
             var channelCount = mat.Channels();
 
@@ -18,7 +18,7 @@ internal static Mat ToGrayscale(this Mat mat)
             };
         }
 
-        internal static Mat ToBGR(this Mat mat)
+        public static Mat ToBGR(this Mat mat)
         {
             var channelCount = mat.Channels();