Icon showing number of Unread documents - customizable to something else? Getting rid of Unread bold, etc

I searched through the help and also the ebook and I’m sure the answer is there somewhere.

Next to my folders I see an icon showing the number of unread documents. I’d like to change that to showing simply the number of documents in each folder.

Also wonder if there is a way to Mark As Read all documents? I only see the opposite option (Mark As Unread).

That is the correct option. It will toggle when you choose it.