Mosaic-Crop

You can easily create a mosaic of an image that runs over a set of image frames.

To create a mosaic:

Select a set of image frames on your document (e.g. Command-A):

Select images.
Drag & Drop one image from the image browser onto one of the selected image frames:

Drop mosaic image.

Posterino will add the dragged image to every selected image frame and adjust the image crop of each individual frame to form the mosaic.

To update a mosaic:

You may have altered the position or size of some of your images that form a mosaic. The mosaic may now need an update to get back in place again.

Select all image frames that form the mosaic:

Select images.
Context-click (ctrl key + mouse click) one of the selected image frames and choose Apply Mosaic-Crop from the context menu:

Choose 'Apply Mosaic-Crop' from context menu.

Please not that the Apply Mosaic-Crop context menu command will be added to the context menu only if all selected image frames hold the same image.

You don't need to select all images on your document for the mosaic. This feature will work on a sub-set of images too.
The Mosaic-Crop works with any kind of layout.
Hold down the Option key while you drop the image to the set of selected frames to add the image to every single frame without applying a Mosaic-Crop.
Click the Shuffle button on the bottom toolbar of the document window to create a puzzle from your mosaic ;-)