Crossing out or outlining text and saving this?

New Here ,

I get alot of text from my studies on PDF, so I use Acrobat Reader for this, but whenever I outline or cross out some of the important text and want to save it ....the program either crash or is stuck on a blank saving screen. Does anyone know what to do here?

TOPICS

Crash or freeze , Edit and convert PDFs , General troubleshooting , How to