[Lisa Wilke-Thissen]

Hi,

I am working on a Word Document using Word 2007.
I would like pages 1-5 to be in 1-Column format and
pages 6-15 to be in 2-Column format, then pages
16-24 in 1-Column format again.
Does Word have the capacity to do that?

select pages 6 - 15. In the dialog box for columns choose "Apply to selected
text". Word then will insert section breaks before and behind your selected
text.
Alternative you can insert section breaks by yourself at beginning of page 5
and at the end of page 15. Then choose columns for the section appropriate.

Cheers,
Lisa [MS MVP Word]