https://bugs.documentfoundation.org/show_bug.cgi?id=45617
--- Comment #31 from [email protected] --- There is a some 'clever' but infuriating behaviour hiding behind this bug. Master slides seem to carry some kind of unique ID code with them, to help reformatting of slides when they are being restyled. Example: 1. Create new ('original') ODP 2. modify the *master* slide by placing a text box "TEST" on it, close the master. 3. Create a second ('new') ODP 3. copy the slide from the first ODP to the second ODP Result: the master-slide text "TEST" does not appear in the copied slide. This is because the master slide is being recognised as "equivalent" in both cases, and the modifications in the original ODP are being dropped when the slide is copied to the new ODP. Expected result: perhaps it would be expected to be asked if (1) the existing master slide used (2) the new master used to replace the old master, or (3) a duplicate master added, so that both slides can look just as they were before. I thought it might be possible to hack the "copy master" behaviour by tweaking the name field in the styles.xml file embedded inside original.odp. But so far I couldn't figure it out. How can I convince Impress to think that the master slide in original.odp is NOT the same as the master slide in new.odp? Copying styled slides therefore has some very strange behaviour that depends on the exact way that the masters were created. If a single slide is copied from an original ODP to a new ODP, then its master slide edited, then the slide is copied back top the original ODP, the modified master does not overwrite the master in the original ODP. It would appear that there is a unid UD its master modified, then copied back to the original There seem to be various issues with the support for master slides in Impress -- certain attempts to edit text styles don't get kept, and it's all a bit mystifying, especially when starting with PPTX templates that have been generated in a recent Powerpoint version. What seems to work well is creating the master slides again from scratch! But this is very tedious, because of the current bug. Having set up the font for titles and outline text, one cannot copy a master slide in order to create the different 'variants' that a complete template requires. That's the use-case for this bug -- being able to duplicate master slides makes it much easier to develop a set of master slides with a common theme/styling. People are trying all sorts of desperate hacks out there! https://superuser.com/questions/1258788/how-to-copy-a-master-slide Adding the 'duplicate' feature would be enough, in my mind, if that's easier. Copy and paste is not necessary, since one can always copy and slide (inheriting whatever master) instead, and that works fine between different .odp documents. Modifying a master by copying it to another sheet then copying it back doesn't seem to work. It seems that there is some sort of unique identifer attached to each master slide design... is that true? Copying -- You are receiving this mail because: You are the assignee for the bug.
