@Perhyte@cloudless Agree, but fwiw, IMO, #Sidebery is even more powerful & flexible than #TreeStyleTab AO. After being spoiled by both these for years, #Nightly has heaps of catching up to do before the native solution will become my choice... but i emphatically DO want sophisticated #VerticalTabs to be native, so hope the Devs learn from & adopt from these two AOs.