See Also
Onelines can be any size and can contain any number of objects. The size and position of objects on the screen are specified in terms of x-y "oneline screen coordinates." When the zoom level is 100% the size of the oneline in screen coordinates is 100 by 100. More generally, the size of the oneline is 1002 divided by the zoom level in both the x and y directions.
The default screen center is the point (50,50) but this can be easily changed (See Oneline Panning and Zooming.) Negative screen coordinates are allowed. Usually you will not have to be concerned about an object's location in screen coordinates.
The Status Bar displays the current cursor screen coordinates while in Edit Mode.
Status Bar Showing Screen Coordinates