Hi VictorIE,
I have seen them before, but I didn't add them. I can't explain them either.

Vincent, it's me, Anne, we met before. :D
I'll keep it in mind and switch to metric from now on.

No, there isn't, I was just trying to adapt to what people seem to use locally. I'm all in favour of the metric system, but I have yet to meet someone here who uses it.