Editing Subject line on received emails?

In Eudora I could edit a subject line on an opened email, but I have not found a way to do this in Pandora.

Is editing the subject like possible in Pandora?

Of course - right below the caption bar. You can also use Alt+B to set focus on Subject text-box, and here is one hidden feature:

Hold down Shift key and double-click on Subject label (to the left from Subject text-box) to reset Subject to original text.

OK, that is so obvious...