The MX Ergo trackball uses a trackball for navigation instead of a traditional laser. You can use Logitech Options software to customize the Gestures feature. 
NOTE: If you don’t have Logitech Options, you can download the software from this product’s Download page.

To customize gesture functionality:

1. Open Logitech Options and select the MX Ergo trackball.

   

2. Select the Trackball tab and then click on the trackball circle to access the gestures.

   

3. The Precision Mode drop-down menu appears. Click More to display the Gesture option and then select it.

   

4. The Gesture button window appears. Here you can customize the Gesture button. Your changes are automatically saved.