backgrounds in slides & poll question

When I create a looping slide show for announcements, it seems to only allow one background for all slides. Is there a way to have a different background for each slide?
Also, is there a way to include a poll cue in a slide show?  In other words, I would like it to go from the announcements to the poll slides and loop back to the announcements slides.  I can't see a way to add the poll to the slide show, nor is "go to PREVIOUS cue" an option, only "go back to first slide" (in poll cue) or go to NEXT cue

Thanks for the post!  Yes, one background per cue.  You can insert an image or video in the slides presentation and make it full slide to simulate a background if needed.

You can include poll results in your slide show.  Draw a box and select "poll" as the box type.  It will operate just like any other slide.

But no way to include the poll itself, only the results?
Or a way to loop back to previous cue instead of next cue?

You can include a poll question and url.  Those are just text boxes on a slide.  You can find a poll url by editing a poll.