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I'm not very good at writing notes so I use photoshop to edit the original papers I read for my studies.  It actually works really well, but my one problem is this:

I use the pen selection tool alot cut out selections of text. It would replace a highlighter perfectly, were it not for the fact that I find the process too 'slippery'.  It's difficult to make precise selections as alot of the time I move my hand slightly too much and end up selecting way too much.

Is there any way to add some traction between the cursor and the layer, to make the selection less fluid? Or a way to make the tool select little bits at a time in fast succession, like the hightlighter on Word?

I'd really appreciate some tips, something like this would be a lifesaver.