If I right-click the area of a slide in the main pane of my Impress window, I can choose "Change Slide Master..." and get a dialog for choosing a different master. However - the same is not true when I right-click one, or multiple-selected, slides in the Slides Pane. There is just no such context-menu item - and there really shoud be. This is definitely something I need to do revatively frequently in multi-master slide decks.
Code pointer: sd/uiconfig/simpress/popupmenu/pagepane.xml
Karthik committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/d501fe41ddcb2d338baee301cbd534944cd116ff tdf#164012 Add Change Master... below Move in Slide Pane context menu It will be available in 25.8.0. 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.