Is a way to select all unread messages in a folder?

To search for “Unread messages” in any folder.

First click the (Dropdown arrow) at the end of the search box top right corner of EMClient.

Next click on (Custom folder selection) and select your folder to search.

Then type in the search box -  read:no - and (press enter). You will then see all the unread messages.

You could also just click on the folder you want to search in (on the left) and then in the search dropdown arrow top right of EMClient click on (Current Folder). Then type in - read:no - in the search box, and you will just get the Unread messages in that folder without clicking custom folder selection.

Thanks, it’s worked.