Axis origin for calculate items position!

Hello, where is the origin of the X and Y axis for placing items.

So far it seem to me that is calculated from the Top left Corner but I´m not sure, normally the X and Y origin is set on the bottom left corner  but I´m a little confused because is seem to be different.

Hello, where is the origin of the X and Y axis for placing items.
So far it seem to me that is calculated from the Top left Corner but I´m not sure, normally the X and Y origin is set on the bottom left corner  but I´m a little confused because is seem to be different.

In the Many Years ive worked with computers it’s always been the top,left corner.  

Nice, well actually my CAD application the origin X-Y work from the bottom left corner, that picture will help me a lot.

Thanks Again…Cheers.