I'd like to be able to reuse a resource across multiple slides (multiple instances) and be able to edit the "master instance" and apply changes to all instances. In Illustrator / Sketch this reusability comes by the name of "Symbols". Is there a templating mechanism in PowerPoint that would allow me to achieve this? I know I can go into the Slide Master and modify the used colors and fonts but it seems like that's about it....
Why do I need this functionality? I like to take advantage of the Morph transition since it allows me to easily produce complex animations and at the same time keep the presentation well structured. The major issue with this approach is that once I'm done with the slide sequence that morphs a set of elements I end up copy-pasting stuff for every little change I want to make.
Here's a simple example.
This is my original presentation: https://1drv.ms/p/s!AqErqjP9BQgCw1ex_rzI2npQiQ08
This is a modified version where I swapped out the first image: https://1drv.ms/p/s!AqErqjP9BQgCw1g3nJR0_EkoZkZT
For the second version of the presentation I had to go through every slide and copy-paste the new image on top of the old one. I know I can try to achieve the same effect within a single slide but that's not really an option for me.