Editor Preferences
This dialog allows you to examine and change many of the items in the Preferences file.
The box on the left lists the packages currently known to the editor. Your Linguist implementation may have fewer or more than those shown. You can add a new package by typing its name in the panel above the list then clicking the Add button; you can remove an existing item by selecting it and clicking Remove, and you can move a selected item up or down in the list. When you OK the dialog the changes are applied immediately.
The editor needs to know about the packages in order to apply keyword highlighting. When it starts up it searches through all the files in the named packages and extracts all the keywords.