ZBrushCentral

Zbrush 3.5 4K displacement

Hi,
I’m trying to export a displacement map in Zbrush for maya. i can create the displacement map, however some of the fine details seem to be missing. I would like to export a 4k map but i cant see the option to change the displacement map creation size. Any ideas?

Thanks
Richard

Tool palette, under UV Map change the map size.

Richard