[FIXED] disabling thumbnail side panel in pdf files while in markup mode
it seemingly used to be that the thumbnail scroller on the left hand side in Preview, when opening pdf files on the ipad, was impossible to hide. This had annoyed many left handed users.
However there is now a way to hide it! At the top left of the display pane when the pdf is open a page number box will be displayed e.g. 59/60. It's light grey in appearance. If you tap this, it will hide the left side panel for you. Ta'da!