'Nother Glitch?

Ap/Mac of course--

My 'Delete' basket up there at the top has changed to 'Undelete,' and so how do I change it back

Thanks all

Added: Wow but the Glitches are apparently active today ! because when returned to Email I found I could change it back and forth from one t'other by clickin.' But then after a bit the 'Delete' finally stayed, don't know how or why, but God please leave it there...