Is there a way to enforce straight mouse movement(horizontal, vertical, diagonal) in macos? I was wondering if there is a way to enforce a straight pointer movement in macOS.
For instance when you are annotating a PDF document, you may want to make a straight stroke as an underline.
So what I'm looking for is a feature like when moving your pointers with the shift key pressed, then the pointer movement would be restricted to a straight line (either horizontal, vertical, or diagonal).
Is there such feature in macOS, or other applications which makes this possible?
You can, in fact, make specific dedicated underlines.
In the top bar, the pencil tool, there are options for Underline &amp; strikethrough.
Both will track any text you select, letter, word or paragraph…

Giving this [the blue highlight is the selection, the red line is the added underline]



Instructions from my beer-making xmas prezzie ;)