Freehand bug

I’ve been using this app to annotate pdfs, especially those that don’t have word recognition (so I can’t highlight text), and so far I like that I can add shape boxes wherever I want (and not like with current Preview where the box appears and you have to move it). However, I was looking forward to the freehand writing tool to underline words faster but it just doesn’t work. I see the line and as soon as I’m done clicking/underlining, it disappears! I tried changing the color, the style of the line, etc, and I just cannot figure out how to actually see the lines once I’ve made them. I’ll keep the app around in case this is a bug that’s on its way of being fixed. I have El Capitan, btw.

GemmaGSchmidt about PDF Reader: Edit, Fill, Sign