Change the order of layers in dialogue box?

I am working on a model with a long list of different layers and would like to move them into an order that is easier to locate items. Seems like I used to be able to click, hold and slide them up or down but that’s not working. So neither am I … Trying to figure this out.
Would appreciate suggestions.

I believe layers can only be sorted alphabetically (or by visibility or color) so you would have to rename them to force an order.
Scene list can be ordered as you like.