Go to the Gallery > Click the Options icon at top right > Choose Collage.
Choose the album and select the photos you want to use, then tap DONE.
In the Collage page, you can change the layout style, resize the photos, and rearrange the photos how you like.
Tap Save when you complete your editing.

Note: The operation steps/information in this FAQ may not be applicable to all types/series of Zenfone product. Some options in the screenshots and operating procedures may slightly vary, depending on the software and firmware version.