Each field on a generated form typically fills the width of the form. When modifying the layout of a particular tab, keep in mind that many fields may not need to be the entire width of the form. By organizing these types of fields into two columns, you may be able to decrease the height of the form.
This is particularly useful if one or two tabs on a multi-tab form have a large number of fields that increase the height of the form to fit all of these fields. Other tabs on the same form use the same height but may then have too much blank space that violates your organization's usability design.