The 3-by-3 grid holds more frames and works well for year-in-review posts, travel sets or splitting a single image into nine parts for a carousel. Fill each cell with its own shot, move and zoom it, and adjust gaps and rounding.
The format is a 1080×1080 square, but it's easy to change to any other. Download the finished collage as PNG or JPG in good quality, with no watermark and no sign-up.