How to add a subfolder in Mac Mail with OS Catalina
I used to be able to add a subfolder. Now that I'm using Catalina 10.15.7, it is not working.
I click in Mailboxes under On My Mac.
Then I click/choose the folder I want the subfolder in and choose from dropdown menu New Mailbox.
I name it.
Then I drag it to the Mailbox where I want it.
I goes into that folder.
But then all the other mail disappears that was inside that main folder.
I have to delete the subfolder in order to get the mail that was saved inside that folder.
What am I doing wrong or is there a bug?
Any ideas? Thanks,
Marguerite
MacBook Pro 15″, macOS 10.15