[Therion] colour by map

When you have coloured by map, in the header there Therion automatically added a legend of what colours go with each map. Generally I do not find this useful, but cannot find a way to turn it off, without doing a \def\maplayout in code, which seems over the top. Is it possible to turn off the map colour legend without resorting to code. It would be very useful to be able to stitch this off without having to redefine the header! Andrew