Insert Images as "Links"

Hey guys,

I have a simple question and I hope I can describe it well so you can help me. Sometimes I am working with "heavy" files, images of huge size and when I thrown them to corel it really starts to slow down.

My question now is, if I remember correctly there is an option when you import an image to corel it just keeps the path of the image and adds the image on corel on very poor quality just for you to work easily. When you are finished you just make something and the paths of the images are replaced with the originals.

Where can I find that option?

Thanks for your time.