With what program are you working and with what version of the program and on what computer operating system?
I suspect that you are working with some version of Photoshop Elements. If that is correct, then be advised that some how
your thread got posted in the Adobe Premiere Elements Forum (video editing) instead of the Adobe Photoshop Elements Forum (photo editing).
If Photoshop Elements question, then please re-post your thread in the Adobe Photoshop Elements Forum or wait for a moderator
here to see your thread here and move it from here to there.
Thought....if are creating an image on a transparent background in Photoshop Elements Windows for a Premiere Elements Windows project, then you Save As png or psd.
Please clarify if I have misinterpreted your question.