Download Merlin 128 manual

Merlin 128 User's Manual
The Editor
key command is undone by Control-R. This includes the C= *, C= -, and C= = commands
which are considered line oriented commands for this purpose.
The line deletion commands C= D and C= DEL are undone by creating an empty line with
C= TAB followed by C= R. If you forget to create the empty line, type another C= R and
repeat the above procedure.
The C= R command undoes itself.
A CUT (C= X) is undone by a PASTE (C= P) without moving the cursor off its line.
If you are entering a line of text in response to a prompt, such as a filename, PRTR
initialization, or dialog box, you can press Control-C or Control-X to cancel the line.
Page 34