User`s guide

Description
This command displays a text message on the top line ("WINDow1") or
bottom line ("WINDow2") of the instrument's front-panel display. The top
line ("WINDow1") is the default. The instrument can display up to 12 (top
line) or 18 (bottom line) characters on the front panel; any additional
characters are truncated (no error is generated).