How to add the current slide number plus the total slides in Keynote? I am wondering how I could achieve something like that in the current version of Keynote for OSX:  

For example the current slide is 3 and the total slides are 10.
And I want to show it like (3 / 10) and so on.

I could do it manually, but is there some automation for it?
Keynote has no such feature (counting the total number of slides).

Semi-manual solution: Add the total number of slides as a text-box " /10"in your Master configuration. Place it next to the automatic slide number that Keynote generates.