Editing message in Out folder

In Eudora I could edit a message Queued into the out folder but not yet sent.

But I seem to be unable to open and further edit the text of a message in the Pandora out folder before I send.

Any hints?

Thanks so much, -Harry

Of course, switch back to draft:
Hit Message/Queuing, or Ctrl+Shift+E, choose Don't Send.