You can create a collage with a mosaic pattern dictated by the size and orientation of your images. The new layout allows you to add visual interest with smaller photos next to larger ones and a variety of spacing, sizing, and viewing options to customize your image display.
1. Select Content
2. Select a Page to add a image gallery to
3. Add an Image Gallery block by selecting the green + button
4. Upload the images you want to see in your mosaic gallery
5. Select Design this page
6. On the Page section of the Design panel, select Image Gallery
7. Select the Mosaic Gallery option
8. Select Save
9. Select Publish
Note: You can edit the number of columns, spacing, and image views in this panel, feel free to look around.