Epson Endeavor 468C - Manual (Page 67)

Special key functions (continued)
The and key work as toggles; press
the key once to turn on a function and again to turn it off. When
the function is enabled, the corresponding light in the upper
right corner of the keyboard is on.
Stopping a Command or Program
You may sometimes need to stop a command or program while
it is running. If you have entered an MS-DOS or application
program command that you want to stop, try one of the
following:
q Press
q Hold down the key and press
q Hold down the key and press
If these methods do not work, you may need to reset the
computer as described below. Do not turn off the computer to
exit a program or stop a command unless you have to, because
the computer erases any data you did not save.
Using Your Computer 3-15