Fast Company can be configured to print your letterhead or to print onto stationery that’s preprinted with your letterhead. You don’t have to change each individual Master Document.
Master Documents distributed with the software contain an “Include File” option that automatically lets you add in your letterhead. Simply incorporate your letterhead into the Include File. Note: It is not recommended that you overwrite the file with your letterhead, because the file may contain other important formatting codes (such as page-numbering).
The letterhead file that should be modified is ltr&date.fmt, which contains a code to add in the date. There is also an account letterhead called account.fmt.