I had a PDF document opened in a full tab view. When I clicked the sidebar handle, it opened a sidebar that went outside of the grey margin, and outside of the tab. When I clicked on it to add a comment, the contents of the tab shifted to the right, cutting off some PDF content on the left side, and I was not able to shift it back (without closing/reopening the PDF as a new tab)
I had a PDF document opened in a full tab view. When I clicked the sidebar handle, it opened a sidebar that went outside of the grey margin, and outside of the tab. When I clicked on it to add a comment, the contents of the tab shifted to the right, cutting off some PDF content on the left side, and I was not able to shift it back (without closing/reopening the PDF as a new tab)