Right-click an empty area on the desktop
Select View
Choose Large icons, Medium icons, or Small icons
Hold Ctrl and scroll the mouse wheel up to make icons larger
Hold Ctrl and scroll the mouse wheel down to make icons smaller
On Windows, open Settings
Go to System
Select Display
Change Scale and layout to adjust overall desktop icon size
On macOS, click the desktop
Press Command + J
Adjust the Icon size slider
On Linux, right-click the desktop
Open Desktop settings or Appearance settings
Change the icon size option available there