Making my Shapefiles Transparent on CartoMobile

Hi Folks

Iv Imported my shape file over using Itunes and it shows up, and its all geographicaly located correctly which is good :-)

(My shape file in this case is a farm property layout with boundary and internal paddock fences etc)

My query is how do I now go about making the shape file transparent so I can see the map below and also adjust boundarys of the shape files in thickness and colour

Much appreciated