This parameter controls the default value for the Side Clearance amount on the Cut Control tab.
Set the Side Clearance amount and type on the Options tab.
Choose a new Tool.
Then you will see the Side Clearance amount change on the Cut Control tab.
Note that the factory-release default for this parameter on the Options tab is as follows:
Z Rough Pocket Options tab = 0.1
Z Finish Options tab = 0.1.
EDM Options tab = 1.5
The factory-release default for type is Cutter Radius.