Stops whatever Pixie Scheme is doing, and returns control to you.
You can also invoke the "e::reset" procedure from the "Reset" command in the
"Commands" menu, or by typing 'Command-R'.
If Pixie Scheme is doing the wrong thing - perhaps a program has entered an infinite loop -- type 'Command-R' or select the "Reset" menu command to force execution to halt. "E::reset" is also useful for error handling in programs, as a way to stop execution without returning