Set the current position to the values specified. In Marlin 1.1.0 and up, the software endstops are adjusted to preserve the physical movement limits. Thus you could use
G92 to set the middle of the bed to 0,0 and then run .gcode that was sliced for a Deltabot.
[E<pos>] New extruder position
[X<pos>] New X axis position
[Y<pos>] New Y axis position
[Z<pos>] New Z axis position
Specify that the nozzle's current X position is 10 and the current extruder position is 90.
G92 X10 E90
Specify that the nozzle's current XYZ position is 0, 0, 0.
G92 X0 Y0 Z0
Resets selected workspace is 0, 0, 0.