pfft - examples are for girls!
There aren't too many options at this stage;
a) on the form itself, on the Layout Tab you can set the width of the popup form.
the default is 600 pixels.
b) On the Browse, Form tab, at the bottom, tick on "Open Form as Popup".
I think the Browse / Update Invoices in Example 31 (Accounts) has this option on.
cheers
Bruce