that's an ideia, split the pictures region in two areas making the left and right control arrow bigger so the user experience on a smartphone screen will be better.
Actually this plugin was developed just to integrate NIVO SLIDER very easily in a GetSimple page.
This feature concerns more nivo slider itself.
Maybe you can find some info for this request on the nivo slider homepage.
Or maybe you can implement this in a custom theme.
The nivo slider documentation page: http://docs.dev7studios.com/jquery-plugins/nivo-slider
ok, thanks for the workaround! I'll try it out!