Wouldn't it be great to be able to multi select and move slices? add the option for creating groups and lock the values will make the mapper really user friendly.
Two more features that would help:
Zoom in/out (for large comps)
Ability to select between center and top left anchor point of the slices for input and output, right now the anchor for input is top left and the output is center but some times you just want it the other way around especially when working with LED.
