Toraiz SP-16 Slice Suggest

When in slice mode on the Toraiz SP-16 it would be a lot better to be able to use the touch screen to mark our slices instead of using the knobs it seems if those knobs were to wear out from so much turning to find a specific part of the slice ,but with the touch screen it would be a lot easier and less time consuming and maybe save those knobs from wearing out.