The following shortcuts are implemented software v3.4.0:
1-5 change the currently selected axis
- jogs the currently selected axis negative
= jogs the currently selected axis positive (the + key, but you don't have to press shift)
[ selects the next biggest step size for the currently selected axis
] selects the next smallest step size for the currently selected axis
Note that the step sizes apply to the ones listed in the Jog panel on the Production tab, not the ones in the Conf/Jogging section.
You'll need to check your software version under the Conf tab > Version.