How to organise email folders in Big Sur Mail app

All folders show under each account. Move the ones you want to use most into Favorites. They still will not disappear from the account, but you don't have to scroll through your other folders to get to them.

You can’t. I guess I didn’t make that clear.

I hate this too. I have 6 accounts and previously I could see them all in the sidebar without scrolling -- this made for easy access to folders and subfolders; especially when drag/drop moving emails. I only keep a few key top-level folders in each account.

Now I have 36 additional folders showing (6 x Inbox, Drafts, Sent, Junk, Bin, Archive), even though I am using unified folders for these under the Favourites section. By toggling the unified folders open, I have access to individual account folders anyway. So these don't need to be shown unless you want them.

What I can't remember is whether Mail came this way in Catalina (and prior), or if it was a setting I managed to find. I've poked around and can't seem to hide these superfluous folders.

There's nothing wrong with wanting what works for you, when you manage several hundred emails in a day.

Give me back my screen real estate!

The point is that we want these to disappear and only remain consolidated under Favourites.