Entering Keyboard Keys

You select the key to 'override' by simply clicking the cursor in one of the 16 'Keyboard Key' fields, then press that key on your keyboard. To clear or empty a Keyboard Key field, press the Shift key (with the cursor in that field.) Do NOT attempt to enter upper/lower case keys into the Keyboard Key fields since the PS2PRO responds with your programmed string when that key is pressed regardless of the state of the SHIFT key. So just press the key without SHIFT or CTRL or ALT.
ASCII keys like 'A-Z', '0-9' and the punctuation keys appear as themselves in the Keyboard Key field, while non-printable keys like the Function keys appear as F1-F12, Space bar appears as SPACE, Backspace as BKSPC, Enter as ENTER. You can override any of the keys to the left of the large ENTER key near the middle-right of the keyboard. TAB is special, and to enter it press Ctrl-TAB. It is displayed as TAB. So The PageUp/Dn, Arrow keys, Print Screen, Insert, Home, and Numeric Keys and their close neighbors are excluded and cannot be overridden.