Hi again, It would be good to have some advise on how people deal with mistakes in sketches. For example: I have scans of a survey which was drawn up in the field however the centreline on this contains a blunder (a leg 180 degrees out). I can trace the survey and give therion the correct centreline data, but it produces a scrap with very large distortions around the blunder -- I need to redraw a section of the scrap. I can export a .xvi to draw around but that doesn't contain the outline of the rest of the scarp to join in to. I can export a PDF or SVG but that can't be imported as a background into xtherion. How do people deal with this situation? My current idea is to produce a PDF, render to PNG with ghostscript, then import that into xtherion and overlay a .xvi (hoping they'll line up) to get station LRUDs to draw round. Does anyone have an easier way, I have a number of such things to correct? Cheers, John