On Windows, open Settings > System > Display and check Scale and resolution
On Windows, right-click the desktop, open Display settings, and look for scaling options
On Windows, open Control Panel > Mouse to check pointer settings, not DPI
On Windows, use mouse software such as Logitech G HUB, Razer Synapse, or Corsair iCUE to view mouse DPI
On Windows, check the mouse manufacturer’s app or driver utility for DPI settings
On macOS, open System Settings > Displays to check display scaling
On macOS, use mouse or trackpad software from the device manufacturer to check mouse DPI
On Linux, use display settings to check screen resolution and scaling
On Linux, use device-specific software or terminal tools to check mouse DPI if supported
On a phone or tablet, check display settings for screen density or scaling options
For a printed image, use a DPI checker tool or image editor to view image DPI metadata
In Photoshop, open Image Size to see DPI
In GIMP, open Image > Print Size to see DPI
In Windows, use the Snipping Tool or Paint to inspect image properties for DPI
On a webpage, use browser developer tools or image properties to inspect image resolution metadata