i love the tool. but one small thing bugs me. the predicate text beneath the role boxes seems to me to be too far away from the role boxes. there is a lot of whitespace between the role boxes and the predicate text, and given how dense my diagrams are, i need to maximize use of the space. i can manually move the predicate text up a few pixels but i would need to change this for every predicate. could the default behavior in the diagram be changed?