... way to do this is with transition curves, using the make transition function on each track separately. In other circumstances the slew functions can be used to increase or reduce the track centres spacing. More about transition curves and slewing here: http://templot.com/martweb/gs_geometry.htm#transition http://templot.com/martweb/gs_geometry.htm#slewing (those pages are 15 years old, but still mostly relevant) In this case the first thing to do is set up some dummy templates at the required new spacing: 2_020736_530000002.png These are at the standard spacing for straight track of 78.17mm, 106.17mm, 78.17mm (6ft and 10ft way). The .box file for this is attached below. The length of these dummy templates doesn't matter, nor their vertical position on the screen. However, if you shift them horizontally to the right of the positions in the file, it may not be mathematically possible to create some or all of the transition curves. You can if you wish move them to the left a little, which will have the effect ...