If you right click on a section in the gray area on the left where sections are identified->select all objects, you can then right click on the selected objects->format objects->make same size->same height. Then move them to the top of the section (using a guideline if you like) and then bring the bottom of the section up (or use "fit section").
You can also select fields in two different sections, make them the same height and then use that field as the one to make all objects the same (the last object selected has the markers for grabbing and also determines the height when using make same size).
-LB