‘Machine full part’ is available from the bottom of the Setup tab; it provides two different machining strategies, depending on whether the checkbox is checked or unchecked:
Checked (default) - CAM Assist will produce a toolpath strategy to machine the full part.
Unchecked - the user must select the faces of the part that CAM Assist should attempt to machine (see Machine full part - unchecked, below).
Keep in mind
'Machine full part’ may be restricted by the choices you have made within the CAM Assist add-on.
Machine full part - unchecked
When ‘Machine full part’ is unchecked, you must select the faces on the part that will be used by CAM Assist to create a toolpath.