Thanks, yes, but that isn’t quite what I meant. I’ve used ‘V’ when routing as you say.
General wisdom says that to avoid blocking the board, place horizontal tracks on one side, vertical on the other with vias to join the two. Even works between pairs of layers on a multi layer board. Trouble is vias are expensive and take up space on both sides so are best avoided where possible.
Say you have an already routed track on the horizontal side that is mainly horizontal, but it has a short vertical section in the middle or at the end (still on the horizontal side), and you suddenly realise that to get some other track through, you are going to need to flip that vertical segment to be on the vertical side, with via(s) where it joins its horizontal segments. What is the easiest way of doing that?
The ‘other’ tool I used allowed you to select the segment and with one keystroke, flip it to the other side and vias were automatically placed at the joins. If you flipped it back the vias went away again. Fast and easy.
Is there an equivalent mechanism in KiCAD?
The other trick it let you do was to ‘neck’ a segment. Say you have a wide track (0.050") that needs to go between two 0.1" pitched pads - maybe to complete a power grid on a non-power plane board. Again what you could do was select the segment of 0.050" track between the pads, and neck it down to 0.012" or whatever, just for the short distance between the pads. Similar principle - select a track segment and operate on it.
All these tools have their own tricks, I’m just trying to find out what the KiCAD UI allows as I’m new to it as of the weekend.