How to add rounded corners to your images
If you are on SmartAlbums version 2026.3.1 or later, you can adjust the radius of your images to create rounded corners. To do this, simply select the image you'd want to adjust and then use the Radius slider in the Inspector tab:

The radius of an image can be applied to a single image or many images at once (if multiple images are selected). Additionally, the image radius can be adjusted in the Designer View or the Main Spread view.

Modifications to the radius will not reflect in .IDML export format due to alpha channel transparency. Additionally, radius modifications only apply to image frames.