A lot of sidebar UI files have been created, but they have not been added to helpcontent as places to show extended help. Because of this the extended help usually shows up only for uno commands in the sidebar, and not for dropdowns etc. defined in .ui files.
Let's set to NEW.
Dear Gabor Kelemen, This bug has been in ASSIGNED status for more than 3 months without any activity. Resetting it to NEW. Please assigned it back to yourself if you're still working on this.
Dione Maddern committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/5535804563d5f4d94eb1827c928b68232044e72b tdf#113803 Add Extended Tips for Page Sidebar Deck It will be available in 25.2.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.