Epson 500 Series - Manual (Page 32)

The following table summarizes how to use the embedded
numeric keypad.
Embedded keypad functions
Embedded numeric keys NumbLock on NumLock off
Keys pressed by themselves Numeric Alphabetic
Keys pressed with Shift Cursor control Uppercase
alphabetic
Keys pressed with Fn Alphabetic Cursor control
Keys pressed with Shift and Fn Uppercase Numeric
alphabetic
Resetting the Computer
If necessary, you can clear the computer's current settings or its
memory without turning it off by resetting it. For example, if an
error occurs and the computer does not respond to your keyboard
entries, you can it to reload the operating system and try
again.
Caution
Resetting the computer erases any data in memory you have
not saved, so do not use the reset function unless necessary.
Also, some programs classify and store new data when you exit
them properly; so do not reset the computer before you exit a
program, if possible.
Using Your Computer 2-7