I think I figured out what an Idea is. Here is the question I think I was trying to ask:
I have 2 versions of the same design. One for dark shirts, and one for light shirts. The old system, I could make some products and put them in the same Category. The new system has the dark products as one Idea, and the light products as another Idea. Is there a way I can put all of these products into the same Idea?? Making a “Topic” will not be the solution to my problem.
On a similar note, I have some products with multiple color schemes (one with red text, one with blue text, and one with white text). Since it is the same design, I want the customer to look at one Item (formerly one Category) and see the different color schemes they can pick from.