P&ID mark up using acrobat professional

I never thought I can do such a thing using acrobat. But I'm getting more and more comfortable with that. It's a bit clumsy to work. Like you can't go to line "properties" by double clicking (it will go to comment mode, which frankly i never use). But I can create lines,clouds, etc after some practicing. But you can't create custom shapes... like not all things you want in your P&ID can be created. Still it's serving the purpose now.

A far better solution is to use PDF revu. It is cheaper than Acrobat Professional, I guess. You can make the pdf edits quickly using this software. You can create custom shapes and add it to library. After using PFD revu, I really don't feel like going back to Acrobat.