If you don't have a mouse wheel or want standard snapping sizes:
This is the standard way to switch between the three preset sizes: any empty space on your desktop. Hover over View in the menu that appears. Select Small icons . Method 2: Mouse Scroll (For Custom Sizing) how do you make desktop icons smaller
If the "Small" preset isn't quite right, you can use your mouse to scale icons to any size: If you don't have a mouse wheel or