In LibreOffice 5, if I wanted to change the background of all slides at once, I could go to “Slide > Properties”, change the color, and then apply it to all slides.
In LibreOffice 6, I can’t find an option to apply it to all slides at once; I only seem to be able to apply it to a single slide at a time, which as you can imagine is painful.
Now, I know the right way to do this is with master slides. However, I’ve got a bunch of slides I’ve assembled from different presentations, and a lot of them have had their background color set individually (i.e. they aren’t getting it from the master slide). So, changing the master slide doesn’t change them all at once; I’ve also got a bunch of different master slides as a result.
Where can I find the option in LibreOffice to apply slide property changes to all slides, not just the current slide?
As a related question, how do I remove individual customizations to slides and force them to have their properties revert to their master slide?
(Actually, I can’t even find in the menus where you set which master slide to use for a given slide. Is that bulk-settable, so you can change all the slides at once?)
(Version upgrades are always painful.)