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Windows 11 typically times out your screen after 5 minutes if you're on battery and 15 minutes if you're plugged in. This is a useful power-saving feature, but it can get annoying having to wiggle your mouse to wake the screen every time during a lesson.
Right-click a blank area on the taskbar, then click Taskbar settings.
Select System from the sidebar on the left
Choose Power & battery in the pane on the right.
Set a timer for Screen and Sleep options
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