Updated README and SDL html docs

README

@@ -24,7 +24,9 @@ Table of Contents
 ----------------
 * sdl2  - Version >= 2.0  (sdl2 >= 2.8 recommended)
 * cmake - Required to build fceux.
-* qt5 OR qt6  - (qt version >= 5.11 recommended) (Qt Modules Used: Widgets, OpenGL, and Help)
+* qt5 OR qt6  - (qt version >= 5.11 recommended)
+	- Required Qt Modules: Widgets and OpenGL
+	- Optional Qt Modules: Help
 * liblua5.1 (optional) - Will statically link internally if the system cannot provide this.
 * libx264 (optional) - H.264 video encoder for avi recording (recommended)
 * libx265 (optional) - H.265 video encoder for avi recording (recommended)
@@ -95,6 +97,14 @@ OpenGL options:
 For Linux builds, the OpenGL library preference can be either GLVND or LEGACY (default). 
 To use GLVND OpenGL, add a -DGLVND=1 on the cmake command line.
 
+Qt Help Engine options:
+The GUI supports both online and offline documentation options.
+Online documentation requires an internet connection and a browser.
+Qt supports an help engine that can read compiled html files (made via the Qt qhelpgenerator tool),
+these files can reside locally on ones computer and be accessed by the GUI using the Qt help engine module.
+The Qt help engine is an optional dependency and can be enabled in the build by
+adding a -DQHELP=1 on the cmake command line.
+
 Qt Styling Options:
 The Qt GUI can use custom Qt widget styling by providing it a Qt stylesheet file.
 Use the GUI config window to set style options.

web/fceux-sdl-docs.html

@@ -191,15 +191,7 @@ necessarily 100% accurate or complete):
  <p>
 The Qt GUI can either use the standard system style/themes or custom stylesheets.
 The available standard styles that are installed on the system will be listed when running the executable command line help. 
-To use a provided system style, use the --style command line argument.
-To use a custom Qt stylesheet file, set an environment variable named FCEUX_QT_STYLESHEET that contains
-the full path to the file. This will check for this at startup.
-If the variable is defined and the file is readable by the program,
-then the styling settings will be used by the GUI.<br>
-<br>Bash Shell Setup Example:
-	<pre>
-   export FCEUX_QT_STYLESHEET=/home/me/myFceux.qss
-	</pre>
+To use a provided system style or a custom Qt stylesheet file, make the proper selections in the Qt GUI config subwindow.<br>
 For information on Qt stylesheet syntax, see <a href=https://doc.qt.io/>Qt online documentation</a>
  </p>
  <a name="using-hotkeys"><h3>Hotkey Assignments</h3></a>