Samsung Galaxy S6 User Manual page 188

2. Tap the picture you want to crop.
3. Tap Edit > Collage.
 Enhancement tools display
4. Create a photo collage with these tools:

Aspect ratio: Adjust the aspect ratio of the collage.

Layout: Change the layout of the collage.

Border: Add a border to the collage.

Background: Change the background of the collage.
Camera and Video 179