Created attachment 198870 [details] Demonstration video See attached demonstration video. 1. In "Tabbed" notebookbar UI mode, switch to a specific tab that you want to simplify (ex: the "Data" toolbar tab in Calc) 2. Menubutton > Customize... 3. Disable a button from that Data toolbar target Result: in the background, the notebookbar switches back to the Home tab, so it is very difficult to see the effect of what you are doing in realtime. See attached video. --- Observed on version: 24.8.4.2 (X86_64) / LibreOffice Community Build ID: bb3cfa12c7b1bf994ecc5649a80400d06cd71002 CPU threads: 8; OS: Linux 6.12; UI render: default; VCL: gtk3 Locale: en-US (en_US.UTF-8); UI: en-US Flatpak Calc: threaded