I am using speedgrader for the first time. I like most of the flexibility but I can't seem to figure out how do undo something I did?! I accidentally had the strikeout go too far and it is striking out text I didn't want it too and I can't undo it? This is true for highlights too. I can delete or edit a comment or text box but can't figure out how to undo the highlighted sections and the strikeouts.