During input, if placed at the end of a field, deletes data in that field. Copy and paste only work in unprotected fields. No harm done.
All red lines are required fields .
Anything in blue cannot be changed. It isn't necessary to type in the leading zeros in the screen number. You can, for example, type in the screen number as just 3 to access screen 003. If you have made an error, a diagnostic message will be displayed across the top of the screen. For an explanation and help on how to fix the problem, place the cursor on the message and press F2.