Feature allowing automatic wallpaper changes every time you unlock the screen.
Here's how to set up wallpaper slideshow on the Asus Zenfone 4 Max Pro:
Step 1: Go to lock screen settings.
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Step 2: Choose the wallpaper slideshow settings.

Step 3: You can select wallpapers according to your preferences for the slideshow.
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Setup completed successfully. Best wishes for your success.