Some libraries contain “flex track”, designed to be bent, stretched and trimmed. You can do this to AnyRail flex track by using the control points. These are the little crosses that appear at either end of a piece, and on either side of it. Dragging the control point changes the track.
AnyRail checks the track as you shape it and paints it red if:
•You over-stretch it
•You bend it into overly tight curves (likely to derail a train)
Of course, these features can be switched off (The AnyRail SETTINGS tab).