The external dwell jitter margin settings (on eye control)

If you want to use dwell outside of Mind Express, then you can specify the area within which to dwell.
  1. Choose Tools > Eye tracking > Selection.
  2. Select the Dwell selection option.
  3. In the External dwelling jitter margin: field, enter the size (in pixels) of the dwell area. If the mouse pointer leaves this area, a new dwelling starts.
  4. Click OK.