I'm working from an existing drawing, turning it into a 3D object.

Let's say I have a plate (rectangle then extrude). The lower left hand corner is on the origin. I want to make a hole in the plate.

Easy enough, put a circle at the right place, move to the top surface of the plate, extrude into the plate and remove the material via a boolean.

In other CAD packages there is an "object inspector" or some such that yields the exact information about the object. One can enter numeric data there to be very specific about the placement of the object.

Placing via the mouse is a pain, I just want to enter the numbers from the drawing. Can someone clearly explain to me how to do this?

Thanks!