Marco I think this is already implemented as described here (near the bottom of the section) https://therion.speleo.sk/wiki/examples#colour_scales_-_lookups but not for surveys. However you can create a map that contains only one or two centreline surveys, and then colour that. That may not work however, as it is only the map-fg that is coloured, I imagine. However when I was testing I could not get the syntax; select map1 -color [100 0 0] to work, but you should still be able to use a lookup to achieve the effect. Bruce From: Therion <therion-bounces@speleo.sk> On Behalf Of Marco Corvi via Therion Sent: Tuesday, 17 July 2018 19:16 To: therion@speleo.sk Cc: Marco Corvi <marco.corvi@gmail.com> Subject: [Therion] coloring what about a scrap option "-color" that overrides the layout foreground color ? survey too could have a color option. marco