Odat,

the position of objects still references their bottom left corner as well.
Correct, but this was not the question

Soquili, yes, long time no see/read/hear. Have been tied up with a new biz.

No, the rulers won't display negative numbers.

BTW, you can 'pull' the origin to any new place on the board: just click and drag the square 'between' the rulers in the top left to any position - this will be the new origin.

It's like in CAD where you can place a new construction layer onto any object...