How to enlarge a Graphic?

[Norbert Böhm]

Hello,

can I ask here to a Lyx - Problem with Graphics?

So, the Problem is, that I want to set a Graphic over the holy entire
of a A4 - Page. I may set of the margins for this site. I think there is 
a special TEX - command to do this, but I searched yesterday for many 
hours and found different and unclear answers.

Please help me this Way!

Greetings, Norbert