To add a collage block, click the blue ADD A BLOCK button in the upper-right-hand side of your screen. A new window will pop up, listing the types of blocks you can use in your video. Under the “Special” category, you can find “Collage.” Click to add a collage block to your video.
If you want more or fewer images added to your collage, click “See More” at the bottom of your collage block. This’ll take you into Edit mode, where you can edit your collage layout, adding up to 9 images per collage.
Once you’ve decided on a layout for your collage, you can drag and drop images from your Media tray on the left. You can also zoom in on images—click “See More”, then use the slider tool under “Edit Image” to zoom. While you’re in Edit mode, you can also click on images to move them around if you want to adjust how they’re framed.