Easily make your favorite photo the home screen of your Echo Show (fastest option)
Open the Alexa app > tap "Devices" in the bottom navigation bar > tap "Echo & Alexa" and select your Echo Show device > scroll down to tap "Home Screen Background" > select photo from your smartphone > tap the "Upload" button. (Note that it may take a few minutes before the photo appears.)
Alexa can also display a slideshow of your favorite Facebook album on the home screen
First, give Alexa access to Facebook: Open the Alexa app > tap the hamburger icon in the upper left corner > tap "Settings" > scroll down to tap "Photos" > tap "Link account" next to Facebook > follow simple prompts.
To start up a photo slideshow on your Echo Show: Swipe down from the top of your Echo Show screen > tap "Settings" > tap "Home Screen" > tap "Background" > tap "Facebook" (wait a minute for it to load your albums) > select the album(s) you want to display in the slideshow!
Pro Tip: If you have the all-new Echo Show 5, follow the steps in this post to display a slideshow of Facebook album photos (it's a little different from the Echo Show steps).
If you use Amazon Photos, that works too
Just follow the same steps under "To start up a photo slideshow" above (except select "Amazon Photos" instead of "Facebook")!
To read more about getting started with Amazon photos, tap/click here.