My Definition & Concept Slide Layouts

My Definition & Concept Slide Layouts - student project

It was fun anticipating the kinds of layouts I will need and then making them.
It will really speed up the creation of slides needing redundant layouts.

It's also the first time I've used the "fit to a custom size slide" function (in PPT 2016) to capture them as an infographic for this posting. Each screen capture dropped in and resized well!

Problem: I can see and access the layouts as options in the deck where I created their master slide templates. I don't see them when I open a new file. I was not in the default Office theme when I created them.

How do I make them available across themes.
My Definition & Concept Slide Layouts - image 1 - student project