E is a display editor designed for use from Stanford display terminals.
However, it can also be used from Teletype-like terminals, though not
especially conveniently.  To learn how to use E, type: HELP ETEACH
(You must be logged in first, and at a display terminal.)  ETV is the
command for editing a file with E.  CETV for creating a file and then
editing it with E.

The complete documentation for E is located in the file E.ALS[UP,DOC],
which can be accessed on the update page by the monitor command ET ?<cr>.