Change height of pages


I have many elements on my Add and Edit pages so I see a vertical scrollbar to scroll down the page.
But there is much space left on the screen so if I could change the height of the add / edit pages then I would not need the scrollbar.

Is there a way to increase the height of add / edit pages so that I can avoid the scrollbar ?
Or alternativly can I make the add/edit pages resizable so that the user could resize the page ?

If you use dialogs for Add/Edit pages you can set the dialog height: