The placement and removal of tool symbols on the display on the top of the page is hard to control and unnecessarily complicated. It is clear how to add tools to the display by selecting the upward arrow, but why can't I remove tools in a similar manner? Why are the 'custom quick tools' hidden behind two other menu items? Ideally, one should be able to replace the displayed items by dragging their symbols on and off the display bar. There is a huge advantage of convenience when the tool is pinned to the top display bar versus having to find them in a hidden menu. Since its creation, PDF editing has been like that - clumsy, NOT user friendly. It's high time to shape up, Adobe!