The CLEARP command (Insert | Parameter Change | Clearance Planes) allows you to define a clearance plane value for the current workplane. Clearance planes, in essence, create an envelope around a part where the probe will always travel to when it moves from one feature to another.
The Clearance Plane tab of the Parameters dialog box allows you to turn clearance planes on globally. The CLEARP command only defines the clearance plane for the first hit of a feature. To use the defined clearance plane, open a new line, at any place beneath the CLEARP command location in the Edit window, and type the command: MOVE/CLEARPLANE, or select Insert | Move | Move Clearplane from the menu.
To define a new clearance plane, select Edit | Preferences | Parameters, and then use the Clearance Plane tab to define the new plane's values.
For an in-depth discussion on how to define and work with clearance planes, see "Parameter Settings: Clearance Plane tab" in the "Setting Your Preferences" chapter.