Right-click the desktop and select Display settings
Check the Display resolution field
On Windows, open Settings > System > Display
On macOS, open System Settings > Displays
Check the Resolution setting under the display options
On Linux, open Settings > Displays
Use the xrandr command in a terminal
Run `xrandr | grep ‘*’` to see the active resolution
On Windows, open Command Prompt and run `wmic path Win32_VideoController get CurrentHorizontalResolution,CurrentVerticalResolution`
On macOS, hold Option and click Scaled in Displays settings to view available resolutions