Instruction manual
MFJ-1289 Multicom User's Manual Page 50
<Esc> Exits to the terminal mode without losing any text editor data.
You may return to where you left the editor at any time, to
continue editing, by pressing <F10> from the terminal screen.
<Del> Deletes one character to the right of the current location.
<BackSpace> (Backspace key) - Deletes one character to the left of the
current location.
<Tab> Tabs 4 spaces to the right of the current location.