Hi,
the distance of the two boxes is currently defined by the length of your text. The longer the "xxx" comment the farther the distance. To reduce it you need either to incorporate line breaks "xxx\nxxx" or use a narrower font and smaller font size.
Is that something you want to consider or do you have something in mind. If the latter could you please add some more information on how you think it should look like.
BR,
Michael