Hi Roger,
I also don't have a pendant. Try the following:
Ports and Pins -> Input Signals
Jog X++ Enabled Emulated Hotkey 38 (arrow up)
Jog X-- Enabled Emulated Hotkey 40 (arrow down)
Jog Y++ Enabled Emulated Hotkey 39 (arrow right)
Jog Y-- Enabled Emulated Hotkey 37 (arrow left)
Apply
Reset
occasionally I had to change the Jog mode with the fly out dialog
Jogging with the arrow keys up, down, left or riight show x and y movement on the DRO's
Klaus