PowerPoint 2016 for Mac finally includes the new-style equation editor (which was already available in Word for Mac and PowerPoint for Windows). An equation can be inserted using a ribbon button (Insert → Insert Equation).
How can I add a keyboard shortcut for this? Is there already a keyboard shortcut for it?
For Word I could use the OS settings from System Preferences → Keyboard and set up a shortcut for the menu item named "Equation". But I cannot find a corresponding menu item in PowerPoint. I can only find this feature on the ribbon, but not the in menu. Is there any way to set up a keyboard shortcut for it?
Since the situation seems to be in flux, here's an update:
Older versions, including the one that was current when I asked the question, have the undocumented shortcut ⌘-⌥-=. There is no menu item in this versions that would allow setting up a shortcut manually. Answer by theoden.
More recent versions do not have a shortcut built in, but they do have the menu item Insert → Equation, which makes it possible to set up a shortcut manually. Answer by suntoch.