A friend of mine has done this before, but I forgot how did he do that. These are what I remember:
Set the dpi to 300, black and white while exporting it to the picture file.
Then use either MS Paint or XP photo printer to print out and select paper size of A4.
Can you install PDF Creator and print to PDF within Eagle once the software is installed? It should make a PDF file you can take elsewhere and print out to the correct size. Never done this in Eagle but it works this way in PADS, which is what we use at work.
In the Export Image dialog box allows you to set the resolution of the image in DPI. It ranges from 50 to over 1024 DPI. You set this to match the printer you are going to use and you should have what you need. But some printers are off on the X or Y axis and this does not give you a way to fix that. The first option does.
Can you install PDF Creator and print to PDF within Eagle once the software is installed? It should make a PDF file you can take elsewhere and print out to the correct size. Never done this in Eagle but it works this way in PADS, which is what we use at work.
i printed it as PDF and it looks right in size... i sticked a transparency
to my computer screen and it looks ok! although i pin of the IC is not
aligned with the transparency i use to test the size.
no it's ok now! the PDF creator saved me!!
now a second question...how do i remove the components from the PCB
layout so can only see the board i'm going to print?