All Inboxes bar disappeared on Mac

Northasia wrote:

Hey,

I accidentally dragged the All Inboxes bar on Mac out of the Mail window and the entire bar it disappeared. This bar shows all the emails I linked to this Mac. How can I get it back?

Please note that all my emails are still there and I only want that bar back.

If you move the mouse o the right side of the column you can reveal the Favorite and /or add using the "+"

If you do not see the hidden options, exit full screen mode and try again.

Mail User Guide - Apple Support