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How can I make fullscreen crosshairs, centered on the mouse, appear on my screen? I read a lot of science papers with graphs that I want to quickly be able to see what feature is horizontal/vertical with another feature.

I'm looking for something like the below screenshot of LibreCAD, but for the entire screen.

enter image description here

I searched the repositories with 

$ apt-cache search cross | grep hair

amongst other attempts, and wasn't able to find anything.

user1717828
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1 Answers1

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You might find what you are looking for in the applications dealing with assistive technology, e.g., screen magnification.

Here are a few links which describe applications:

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Thomas Dickey
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