after searching the forum, and the docs
is there a way to momentary togle a point to be the origin.
eg for illustration purpose, let say I have somewhere on a layer a triangle that I want to describe by the sumit coordinate, using one of the summit as origin.
currently I use the move tool to set the desired sumit on the 0x0 of the drawing, let qcad compute the other coordinate, then move the triangle back to his original location. or I do some maths
I would like to select the desired sumit, toggle it to be the origin, get the coordinate, then un togle the point.