To abort any command which requires you to type information at the echo area, type
at any point up to where you would normally press
. For instance, if you type
in order to open a file, and then decide against it, type
instead of specifying a filename.
If you are using Mac OS editor emulation, press
to abort a command.
LispWorks IDE User Guide (Macintosh version) - 25 Nov 2011