Sonic,
You can set the mode in CONFIG>PORTS & PINS>TURN OPTIONS.
The mode choosen is personal preference, but, some of the wizards don't work correctly in both modes.
It is wise to draw in, CAM in, and set the config / post processor for the same mode. Mixing modes is asking for trouble.
Be carefull when using software as to which post processor is selected and you may even want to add a comment line in
the Gcode as to which mode was used to generate the code.
RICH