The ability to create multiple Selection Lists at once

I am currently working on a model with a large number of DMAs. This means I have to select each specific area, and save this as a selection list - so I can easily identify areas in the future. This is a very time consuming task, and the ability to create multiple selection lists at once would be ideal. Also when doing multiple selection saves, have the latest saved folder be the first option shown, so you don't have to navigate to it each time.

The boundary trace function is great for this, but say it could do this for the whole model at once while still identifying the boundaries, and then have the option to look at this data and still be aware of the specific DMAs of the model. This would allow you to create all DMA selection lists at once. I'm sure this could also have other positive functionality.