Setting different margin sizes in different pages [duplicate]

Possible Duplicate:
Change \textwidth and \textheight in mid-document

I am currently using `geometry` package to set margin sizes. I want to set different `\topmargin` sizes for different pages. For example, in the first page, `\topmargin` is 1 inch, and in the second page, it is 1.5 inch. How can I do this?

you can change the layout mid-document by using the `\newgeometry{...}` command.
if you need to return to the top level geometry later on , you then use the `\restoregeometry` command.
As far as I know the syntax is the same as the one you would use in the preamble. one thing to note is that `\newgeometry` will disable all the settings set with the `\geometry` command, with the exception of paper size related ones.