The Help menu items can be used to display information on a variety of topics. Each item corresponds to a .html file in the Help folder. The information is displayed in a separate help window which behaves like a simplified browser. The size and location of this window is remembered when it closes.

These keyboard shortcuts can be used when the help window is in front:

- Hit "+" and "-" to change the font size.
- Hit the left arrow or "[" to go back.
- Hit the right arrow or "]" to go forwards.
- Hit the home key to go to the Contents page.
- Hit the up/down arrow keys or page up/down keys if a scroll bar appears.
- Hit Ctrl-A on Windows/Linux or Cmd-A on Mac to select all text.
- Hit Ctrl-C on Windows/Linux or Cmd-C on Mac to copy selected text to the clipboard.
- Hit enter/return to close the help window.

Special links

The help window supports a number of Glu-specific links:

- edit:file
  Open the given file in your preferred text editor. A non-absolute path is relative to the location of the Glu application.
- open:file
  Open the given file, depending on its extension. A Lua file (*.lua) will be run. A HTML file (*.htm or *.html) will be displayed in the help window. Any other file is assumed to be a text file and will be opened in your text editor. In the case of a Lua or HTML file, you can force Glu to open the file in your text editor by control-clicking or right-clicking on the link. A non-absolute path is relative to the location of the Glu application.
- prefs:pane
  Open the Preferences dialog at the given pane. The pane string must be lowercase and must match a known pane: file, color, mouse.