Right-click an empty area on the desktop
Select View
Choose Small icons
On Windows, hold Ctrl and scroll the mouse wheel down to make icons smaller
On Windows, right-click the desktop, select Display settings, and lower the display scaling if needed
On Mac, open Finder
Click View
Select Show View Options
Move the Icon size slider to the left
On Mac, use Command and minus in Finder if available for smaller view size
Adjust screen resolution or scaling settings if desktop icons still appear too large