Accidentally discovered why the “bug” happens. This auto-triangle drawing happens whenever I clicked the points for the polygon at the speed I am used to on the previous Pro version (version X)! To avoid resulting the auto-generating of triangle, I have to click slowly, interval of probably 2-3 seconds, between each click.
It is true to some other users commenting this version should be named Acrobat DC SLOW. So in the meantime I just have to exercise a lot more patience in using the drawing tools.
Accidentally discovered why the “bug” happens. This auto-triangle drawing happens whenever I clicked the points for the polygon at the speed I am used to on the previous Pro version (version X)! To avoid resulting the auto-generating of triangle, I have to click slowly, interval of probably 2-3 seconds, between each click.
It is true to some other users commenting this version should be named Acrobat DC SLOW. So in the meantime I just have to exercise a lot more patience in using the drawing tools.
Same trick for drawing cloud comment.