The plain text alternative editor facilitates inserting template tags using the various popup menus at the top of the window. See Templates for more information about template tags.
Insert Address Book Tab popup button:
Address Book tags correspond to values on the Address Book card of the current recipient. (Note that you may need to edit your Address book card template to access the various values that display in the popup menu.)
Insert Mail Tag popup button:
Mail tags correspond to values maintained by Mailings, such as the recipients first and last name.
Insert AppleScript Tag button:
Browse the file system for the AppleScript you want to create a tag for. The file extension of the script should be "applescript". The tag name is simply the path to the AppleScript file. The tag is replaced by the value of the script after it runs.
See Templates for more information about template tags.
Check Spelling button:
Click the button to advance to each misspelling. The found misspelling is selected. You can then control-click on the misspelled word to see a list of guesses for the correct spelling.
Clear button:
Erase the contents of the editor.