To set the top margin of the first page of your proposed order to 4 inches:
Place the cursor at the top of the first page (Ctrl+Home)
Click Page Layout > Margins > Custom Margins
In the Page Setup Window, type “4” into the Top Margin input box
Click OK
To set the top margin of all other pages to 1 inch:
At least one line down from the top of Page 1, place cursor before or after any text in the order
Click Page Layout > Margins > Custom Margins
In the Page Setup Window, change the top margin to 1 inch
Select "This point forward" from the Apply to selection box
Click Ok