Windows Media Player doesn't offer a built-in zoom feature, but you can get around this limitation by enlarging the video player pane anywhere up to 200 per cent -- or double -- its original size. Enlarge Windows Media Player video by using keyboard shortcuts or the application's context menu.
Play the video that you want to enlarge in the Windows Media Player app. The app isn't a standard feature in Windows 8, 8.1 or 10 but Microsoft offers it as a free download as part of the Windows Essential multimedia package.
Right-click anywhere on the video screen. Hover your mouse over Video Size and make sure the Fit Video to Player option is not selected. If it has a check mark beside it, click to remove the feature.
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Right-click the video again and select Video Size. Select your preferred size from the options of 50 per cent, 100 per cent and 200 per cent.
Press the keyboard's Alt button at the same time as the 1, 2 or 3 key for an alternative method. This zooms in or zooms out of the video. 1 is the shortcut for 50 per cent; 2 is the shortcut for 100 per cent; 3 is the shortcut for 200 per cent. Always use the number pad above the keyboard, not the numeric pad on the right side of some laptop and PC keyboards.