On Windows, right-click the desktop and select Display settings
Look for Display resolution
On macOS, open System Settings and select Displays
Look for the resolution shown under the display settings
On Linux, open Display settings or Screen settings
Look for the current resolution listed for the monitor
Check the monitor’s on-screen display menu for resolution information
Use your graphics control panel to view the active display resolution
Check the monitor model specifications online for its native resolution
Use a system information tool to view display details