To use Dimension as filters in AA, you have to go into the desired dimension or segment and select the item/s you want then drag it/them to the filter box to make single filter or a dropdown (Shift + drag multiple items). Some of the items are listed by rank (hits), others alphabetically, which can be good for one use and bad for another. Ideally, the user could toggle that behavior in the selector.
Examples:
We have a Product classification for internal Business Groups. If I create a table of Product orders by Business Group, then the rows appear ranked by the metric. If I want to add a dropdown filter with Business Groups alphabetically, I have to go into the dimension, search for items one by one, then either Ctrl + Select and Shift + drag a group, hoping I don't make a mistake in the middle of it, or else individually search and drag one at a time. So here, I'd like sort the list alphabetically.
Conversely, we have another custom dimension set up for the user's selected language, and this is listed alphabetically, but I'd like to populate the dropdown with the top 10 languages. So I'd like to re-sort the dimension item list to rank by hits.