Mapper is an FFGL plugin which offers you 16 slices that can freely be moved/mapped around the canvas. The idea behind it is to map content on a pixelmapping on a per-clip or per-layer level. The execution is pretty simple; drag the plugin on a desired clip or layer then move the content around, crop it and/or shift it inside the bounding box. This can done 16 times on top of each other. Mapper also has some smart options like mirroring the slice on the Y-axis, flipping it around or display a preview grid. To get a better understanding please check our video tutorials explaining this process.