I've asked PDF Revu for two things in the last 2 years. Both not hard to do. 1. Fix the stupid "snap to vertical" problem with highlighting (20% of the time, when trying to constrain a horizontal highlight, it will constrain to vertical instead - PDF Annotator does this right, flawlessly). 2. Separate touch from pen input, so you can annotate with pen and pan with finger. No response on both issues, instead they're busy adding useless, heavyweight stuff that I really don't care about. Oh, and doubling the price, too. The market is ripe for someone to make a better PDF annotation software... I really have to say both Revu and Annotator are not satisfactory.