I suggest storable preferences regarding the style of graphs in graphbuilder. Different journals or presentation templates demand different formats for graphs. This affects especially fonts and font sizes, sometimes also colors or the thickness of lines and so on.
Besides being uncomfortable to change them everytime it is very hard to give consistent results, because its sometimes not easy to find and remember the correct parameters and values in the preferences.
It would be perfect if it would be possible to save and name configurations to your need.