In Keynote 5.x there was a toolbar button where I could change the master of an existing slide. This would keep the content of the slide, but would change the layout to the new master.
I can not find this functionality in Keynote 6.x anymore. I tried to configure the toolbar - but no "Master" button is there. I looked through all menues. And even the context menu of the slide.
Any hints where this functionality is gone?