Absolute Positioning Shaping up using CSS "Build your own website the right way"

I am stuck on page 151 Absolute Positioning Shaping up using CSS “Build your own website the right way”
Until page 150 I have been using the same note pad to write the code for the 3 pages. On page 151 where do i write this code for absolute positioning and what do I save it as. As far as I can see this page has some HTML and some CSS
Can somebody help?

Hi,

Assuming I have the same version of the book as you it says on page 151:

Add the following to the end of your css file:
style1.css (excerpt)

#navigation,#bodycontent,#header{position:absolute}

So you would just add that to the end of the CSS file you have been working with. I don;t see that there is any room for confusion there unless I’m looking at an older/newer version than you.