Publisher produces fixed width pages, that are left justified by design.
Also the background color is supposed to fill all the background padding.
Reference: Understanding background padding in a Publisher web (aka white
space):
http://msmvps.com/blogs/dbartosik/archive/2006/01/07/80563.aspx
If you want to center your pages, there is no built-in capability of
centering your pages, but you can manually edit the html code of each *.htm
file (each web page). However you have to do this each time you update your
site. This code edit is not saved in the Publisher file and must be redone
each time you republish. This may make it impractical unless you are
comfortable editing the code each time.
The workaround:
When you Publish to the Web direct the output to a folder on your hard drive
where you can find it.
Open the index.htm file in NotePad and right after </head> and underneath
the <body> tag string, type or copy and paste the following code after
changing the width to the width of your page:
<table border="0" cellpadding="0" cellspacing="2" width="760"
align="center">
<tr>
<td>
------------------------------------
ABOVE the </body> tag at the end of the page, type or paste the following:
</td>
</tr>
</table>
Close NotePad and save the changes to index.htm.
You will need to repeat this with each *.htm file in the index_files folder,
and then you can then upload your files. Remember, you have to do this each
time you modify your Pub file and produce new .htm files.
There is also a way to semi-automate this process, but I won't go into that
at this point.
If you find all this too tedious, then work with the left justification.
Read the article provided. Continue to use a background color or image to
fill the padding. Perhaps use a 984 pixel width page which is the widest
suggested in Pub 2007, so that the amount of padding will be minimal. I
would caution about making your page any wider than this. If designed
correctly a left justified page can look great and in general will be a
whole lot easier to manage using Publisher.
DavidF