It would be fantastic if highlighting could be done by selecting two points on the PDF, and Adobe creating a straight highlighted line connecting the two points. While annotating documents that are photographs of a text and Adobe consequently doesn't recognize the text, it's incredibly inconvenient having to highlight manually. Despite me trying to create a straight line, Adobe inevitably doesn't correct to straighten it, which becomes really tiresome when I repeatedly have to retry highlighting lines to get them straight enough. It would make highlighting much faster if users could simply indicate two endpoints on the document and the computer connecting them.