How to Find Screen Resolution
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A. Open Settings
In the main window in the lower-right, click Settings.
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B. Click Video
In the menu on the left hand side, click Video.
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C. Identify Resolution
In the top of the video settings, click the drop-down next to Base (Canvas) Resolution. In the list of options, choose the highest value. In this example, it is 1920×1080.
Click Ok to save any changes.