The items appearing in this menu are set by the help_files parameter
and must correspond to the names of text files in the Help-files folder.
Selecting an item from the Help menu simply causes the contents of the
corresponding file to appear in the window.
Feel free to add more items to the Help menu.
For example, you might like to create a file of TEX/LATEX commands to refer
to while editing an input file.
If you want to add more help files, or modify the existing ones, then there
are a few things to watch out for.
Don't use tabs, and avoid long lines if you have a small screen.
If you create a new help file then remember to add it to the
help_files list in the Default file.