The Apple Watch may have a small screen, but it's still large enough to show off those pictures of your little one's dance recital to the grandparents. As long as you've got an album synced from your iPhone, you can even view pictures while your smartphone is out of range.
To help you get the most out of your photo viewing experience, we've put together this tutorial to explain how to set up and customize the Photos app on Apple Watch
Create an Album in Photos on iPhone
The first step to getting the most important pictures on your Apple Watch is to create an album for it in your Photos app on iPhone.
Open the Photos app on the iPhone and select "Albums." Then tap the add icon (+) to create a new one.
Name the new album. For simplicity, I named mine Apple Watch Photos.
Select the photos you wish to add to the album and select done.
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Article Link: How to View Photos on Apple Watch