See
this pretty picture for a visual aid.
All of these colored zones are individual
DTAP_ZONE_* constants, manually tweakable in the Advanced settings menu (Tools > More tools > Advanced settings).
The only thing that has a slightly user-friendlier toggle are the four corners (in cyan), which you can disable (set to Nothing) in the Gesture Manager (Gear > Taps and gestures > Gesture manager).
If you want to *disable* some of the other regions, you'll have to set them to an empty rectangle (e.g., x=0, y=0, w=0, h=0).
Note that tap and swipe zones use the same setting, so you can't, say, disable taps but allow swipes, or vice versa.
With a singular exception: the top and bottom menus (Gear > Taps and Gesture > Activate menu).