Watch the bottom of your screen for a list of keys that work with the field where your cursor is located.
If you need to back up one field, try the ESC key. It works in some fields, but not all.
Press F3 to lookup existing accounts, airway bill numbers, and so forth.
F3 is also useful in a date field, where it displays a calendar from which you can select the date.
Type a few letters from the beginning of an airway bill number then press F1 to see the closest match.
F8 usually exits a screen. If F8 does not work, try ESC.
If you need to go temporarily to another screen, press F9 then type the screen number you need, as the following figure shows. Press F8 to return to the screen you broke out of.