A hot corner is a corner of the display where if the cursor is left there a predefined action occurs (such as starting a screensaver or putting the display to sleep).

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Mac “show desktop” logs me out and restarts applications

I have set my macbook (OSX 10.10.3) to use the upper right corner of my display as a hot corner to show the desk top. Recently when I move my mouse to the upper right corner of the screen it does not ...
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“Put display to sleep” hot corner not working

Does "put display to sleep" hot corner require some other specific settings? All hot corners work perfectly except for this one. Instead of putting the display to sleep it dimms the keyboard. What's ...
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How to restart Windows top-left and top-right corner navigation?

"Corner navigation" has been working fine all along, but suddenly it stops working. Nothing happens when the mouse is pointed to the top-left nor the top-right. "PC and devices → Corners and ...