This is kind of a pet peeve of mine, but I'm going to put it here to see if somebody has the same "problem". (It's a real first world problem, btw.)

The Place/Replace switch on paths and fences... why is it arrows?
I mean first things first - they are kind of small and don't cycle, so you have to press back and forth (if you remember which way is "ON" and which way is "OFF", which I don't. For me the "ON" should be up)

And secondly and more importantly - why? It's a simple state switch, not a list of functions to flick through which would justify the arrows.

Why can't it be a simple, nice, big ON/OFF button?