Thanks Vera for helping out!
You are correct about being able to
add additional categories but you can't actually change the initial category you uploaded to in the first instance using that method.
To actually
move your layout out of one category into another, you need to follow these steps.
1. Hover over your layout image and you will see a small little box in the top left hand corner of your layout, go ahead and click on it.
View attachment 410258
2. Once you click on it, the little box will turn light blue (as well as your layout title) as shown below. An action box will also appear at the bottom of your screen. From there (1) Choose action you want to take, in this case (2)
Move media items ... and then click (3) Go (very important otherwise nothing happens
). This will effectively move your layout completely to another category.
View attachment 410259
Hope that helps
@hoodsmom