Thanks Stacho This is a useful post, and (assuming it is correct) deserves to be written up clearly in the Therion Book and wiki. It potentially clears up problems for which I (and others on the forum) have been searching for a solution for years. I may now revisit some of those old projects when I have time. Bruce _____ From: therion-bounces@speleo.sk [mailto:therion-bounces@speleo.sk] On Behalf Of Stacho Mudrak Sent: Thursday, 25 October 2012 3:46 a.m. To: List for Therion users Subject: Re: [Therion] Marked stations As Marco already mentioned, it can be done after playing a little bit with symbol show/hide. Well, I needed to run therion in debugger to see, what is going on. The problem is, that there are multiple "attributes" and therion does support only hide show for single symbol type. Therefore, specification is tricky. But in your case, this is what you can use: symbol-hide group centerline symbol-show point cave-station symbol-show point station:painted symbol-show point station:fixed First line hides all centerline symbols from everywhere (stations and shots). Second tells therion, that you want to show stations in the cave. But in fact - point cave-station itself does not show any symbol. It only specifies, that stations in the cave should be shown. Therefore 3. and 4. lines are needed to specify, that you want painted and fixed stations to be shown. In fact, if you use symbol-hide group centerline, and want to show some station afterwards, you need to specify explicitely both, whether you want to show stations in cave or on surface and which kind of stations you want to show. You can use also symbol-show point station to show all kinds of stations. And now I am not sure, whether I understand my self ;) But at least, this configuration seems to work on my data sample. It would be great to have some kind of query language, show/hide/color symbols... HTH, S.