To mosaic an image into a grid, select it on your canvas, then access the Split tool
Specify the number of columns and rows, then hit Apply. Your image will appear as a divided mosaic.
Note: Adjust the inter-frame spacing control before applying the splitter to move the frames closer together or further apart.
Each piece of the grid is a separate image frame that can be edited individually or as a mutlis-selected item.
In this example, a variety of image effects have been added to each piece of the grid.
The original image itself has not been cropped - each frame holds a complete copy of the original image, perfectly positioned. You can select the frames individually to apply effects or re-expose more of the photo within the frame.