How to Find Your Screen Resolution
Your current screen resolution tells the monitor how content is displayed. Screen resolution is determined by the monitor and video adapter. A higher screen resolution uses more pixels, which makes images appear sharper on your screen. It also displays more items on the screen and uses smaller icons. A lower screen resolution uses less pixels and displays less items on the monitor. Finding the screen resolution only takes a few minutes in Windows and Macintosh.
In Microsoft Windows
Right-click on the Desktop.
Select "Screen resolution" from the pop-up menu.
Go to the "Resolution" section of the window. Your current screen resolution is selected.
In Apple Macintosh
Click the Apple menu in the left end of the main menu bar.
Select "Systems Preferences."
Select "Displays" in the Systems Preferences window. Your current resolution is selected under "Resolutions" in the "Display" tab.