So i have a stencil which represents an entity - it consists of a stack of rectangles, the top one being the entity name and the ones underneath being the properties of the entity.
In draw.io there’s a stencil that automatically adds a new rectangle/row below the whatever one you’re currently typing in once you press return, so that you can basically add an arbitrary number of properties easily.
Is there a way to do this in OmniGraffle?