distortion when making a background

[imaref]

I am using Adobe PageMaker to make DVD covers. When I paste a pattern background (such as a marble stone look) that I like into my project and resize it, even when using the shift key, the larger background becomes distorted.

How do I make a background without distortion?

 

[Eggles]

Have you tried changing the size by using the Control palette? Just enter in the new percentage e.g. 120%, and make sure the 'keep in proportion' button is checked (two overlapping squares) and it should stay in the same aspect ratio.