How should the guide- words in a memorandum be keyed?

Guide words in a memorandum should be keyed in all caps and centered at the top of the page, above the body of the memo. They should be separated by a colon.

Here's an example:

MEMORANDUM

TO: [Recipient Name]

FROM: [Your Name]

DATE: [Date]

SUBJECT: [Subject of Memo]

[Body of Memo]

This format ensures that the guide words are easily recognizable and stand out from the rest of the memo. It also helps to clearly identify the purpose and content of the document.