The Editor's help is a simple RTF file which is loaded into the EXE
as a user-defined resource with resource type 500 and resource ID 1.

Use Wordpad to make changes or any editor based on the richedit.dll.
This is good enough because BE displays the help using the RichEdit
control. The "better" editors such as WinWord are not better for the
BE help because the produce bigger sized RTF files.

The help pages are separated by an ASCII-127. Each help pages starts
with ASCII character 127 ().

More see functions EditorHelpDlgProc() and StreamInEditorHelp().