Is there a way to change multiple masters at once in Keynote. Examples
Change the background color for ALL slides from grey to green.
Change all fonts from Copperplate to Garamond
Insert a company logo onto all slides simultaneously.
Change the default background to all text boxes to #6699EE
There is a similar question but the accepted answer explains how to do it for ONE master.
This question was asked once before, in November 2011. Has this situation changed?