> How can I keep and display deleted messages in INBOX itself rather than
> moving them to Trash?
What?
Messages you have not read are visible.
Messages you have read are visible.
Messages may be saved where you want them, and visible.
Messages you do not want to save may be deleted.
Deleted messages are deleted.
And since they ARE deleted they are gone. They are not here, and not
visible.
See how that works. (If you want to see them, don’t DELETE them.)