Permit use of Draw for marking up and adding numbers, text,etc when using "Freeze Pane" for Headers. Was functional before latest update.
Allow use of "Draw" functions at the same time using "Freeze Pane" functions. This was possible before the 4/13/2017 update.
You can limit drawing to inside the visible "unfrozen" area in the bottom right, and inside the frozen row and column headers. This would not be unpredictable.
Emily Tran commented
Inking on Freeze Panes was disabled on purpose because of the ink being left in some unpredictable areas. We hear your feedback and will look at options to bring it back.