I was thinking of an improvement to the section plane tool, which would apply in cases of window opening in height that goes beyond the standard, section planes with different cuts to the observer, and other situations that may serve others program users …
Perhaps a good improvement is something like making “editing” the section plane as if it were a group, and you can create more than one section plane in the “same” cut plane, that is, in the same plan group.
Of course in the model I made Section experiment.skp (395.2 KB) is just an attempt as this would be, however, in the upgrade to the 2019 version “should be” done with the section plane tool itself.