I am building a series of master slides in LibreOffice 126.96.36.199. The slides are very similar.
The obvious idea would be to make a single master slide, copy it, and adapt it.
I did not find a way to do that: Ctrl-C seems disabled, and 'Duplicate slide' is disabled, too.
How do I copy a master slide?
Is there a better way of doing very similar master slides (maybe some way of inheriting from a parent master slide)?