Move a field up depending on if checkbox is checked

Hello, say I have the following checkboxes:

A

B

C

D

With only the checkboxes that are ticked showing up on printed copy. Say only C & D are checked, as I have it now there is a lot of space between the previous field and C & D with A & B not printing. Is there a way to move these boxes up to the top to decrease the blank space?

Thanks.