Beta 312 has some final tweaks to track extension. I think it's all working well now and look forward to bringing this handy feature to the main branch. If you can, have a look and let me know!
As a reminder this feature allows to extend or reduce tracks without selling them. In normal mode (ie not build or edit modes) click on the tunnel and drag, then release to do so.
Beta 312:
-fix crash with reducing tracks into path of fences on platforms if fence was 1 cell adjacent to start position
-correct deselection of track reduction zones if then extend and zone over floor of different heights in path of track
-prevent unusual characters input on station/staff test input fields