PCB libraries

Hi Folks,

I am using EDWIN PCB designing suite.

IF I create my own component libraries.

when it comes to printing out the final schematic, the pinout of the device and the printout IS ALWAYS out by 3 -4 mm.

I am using a standard ruler using mm, measuring from the centre of the pin to the end of the component.

The Package is set to work with mm.

Can anyone help, i.e Golden rules when creating component layouts??

Thanks in advance!