I want to create a presentation where my background picture starts off as a normal picture. Then it fades/distorts somewhat so that the text on the PP. can be read easier, and it stays faded/distorted on every slide afterward. Without having to keep "redoing" that animation sequence.

I can't figure this out, and I did not find it on the site here.

Does it matter what format my picture is?

Thanks,

(PS: I am a newbie to this site, sorry if I have broken any guidelines. Thanks again)