I have three caves entered into a folder tree as a hierarchal system, that can be plotted in a couple of variations for each individually or as a whole system. I find that I have two thconfig files for each combination that produce all of the types of maps I would like at this stage. This makes a total of eight thconfig files, each of which is getting quite large, but which are largely identical except in a few details. It's becoming difficult to manage these, and keep the bits that I'd like to be identical updated. I suspect that, like most of the rest of Therion, I can make use of a standard thconfig file that contains most of my favourite settings, allowing my eight specific thconfigs to be very concise. I have played around a bit, trying to save layouts in different files and using lines like; copy StandardLayout but 'StandardLayout' only seems to be visible from within the same file. Have had no luck with 'input', 'source' or 'select'. Probably I'm just missing out a bit of syntax or namespace visibility. Any suggestions