CM Editor Button
The CM Editor is used to write and modify the CMC command files and CMS
script files associated with the map. You should thoroughly read the
sections on CMC Files and CMS Programming
before you try to use the CM Editor.
There is always a script file associated with a map file,
but it's loaded and saved automatically when the map is loaded and
saved, a process that is essentially transparent. The script file
has the same name as the map file but has the extension ".CMS".
The script will do nothing if no programming is added via the Script
Editor.
For this button to be enabled, the "CMS Controls" must have been
added to the map. If you used the Map Wizard to create the map and
told it you wanted to use the CMS Scripting facility then the CMS
Controls will already be present. If not, you can add the CMS
Controls using the "Add Button" on the Tool Bar.
The Control Manager Editor button looks like this:

The script editor itself is a simple plain-text editor. For more
information on using the editor, see the CMS Script Editor
section.