Dear Michael, dear Edwin,

Thank you very much; works like a charm.
I wonder why it did not come to me. Actually, I had tried object snap, saw that all options were ticked on (by default?)
and assumed that THAT was turning it on. Just an idea: while having the button turn orange, could a little Tick or x, or alternately
the words "on" or "off" come on? It would aid intuition alone...

Warmest regards,
Nariman.