Hello, For my Therion’s projects, I wrote a global config file (Config.thc) where I defined all the user defined symbols. In my thconfigs, I call this config file at the beginning of the file with input config.thc. In the layouts, I call the layouts of the config.thc that I want to use with for instance copy drawingconfig. In one of my thconfig, I would like to hide some of these symbols that I have defined in the config file and drawn in a survey. For that, I used in a layout, for instance, symbol-hide point u:symbol_plan (in my config.thc in the layout drawingconfig, I defined the point p_u_symbol_plan as proposed by Juraj Halama). When I compile (with c43b32a), it crashes with this error : -- unknown symbol specification -- point u:symbol_plan Is it because symbol-hide cannot take in account user defined symbols ? Is it because I misunderstood the syntax of this command for user defined symbols ? Is-it a bug ? Cheers, Xavier