While using GIMP, how to use the mouse wheel to enlarge and decrease the entire window

Solution 1:

1. Open GIMP, then navigate to Edit → Preferences → Input Devices → Input Controllers.

2. From Active Controllers, choose Main Mouse Wheel.

   

3. Look for Scroll Up event, then click Edit event; search for Zoom In, then click OK.

   

4. Look for Scroll Down event

   

   ,then click Edit event; search for Zoom Out, then click OK.

   

5. Close Main Mouse Wheel; in Preferences window click OK.

Solution 2:

Hover the cursor in the window you want to enlarge or decrease, and hold the Ctrl key while you scroll the mouse wheel. The whole window gets huge or tiny as you roll the mouse wheel.