I would just use G91 for an increment move. I'll post a screen shot soon with the screen set. I kinda want to have only one DRO input with the option for:
a. Work Coordinates Default movement from user's G54 offset
b. Machine Coordinates G53
c. Absolute jog G90
d. Increment jog G91
e. Axis selection X, Y, Z, A
or just 3 basic DRO inputs for X, Y, Z axes....idk