... size rather than in model sizes is very satisfying and enjoyable. You can either design full size track* in Templot (set a custom scale as 1:1 ), or work in model sizes (S4/P4) in Templot and convert to full size on exporting the DXF, as you asked. To do that: dxf_scaling.png Extract from the help text: "If the scaled box is ticked, the DXF data will be scaled in accordance with the current print> enlarge/reduce size> menu setting." print_any_size.png The scale for 4mm/ft is 1:76.2, so to convert S4/P4 to full size, set the print scaling to 7620% (yes really), but I advise against trying to actually print at that size! Just use the setting to create the DXF file: print_7620.png *But you mustn't use Templot for laying actual full-size railway track -- see the licence terms. And Templot is optimized for model sizes, so some of the defaults and limits will be inconvenient or restrictive at full ...