When the user clicks on a "create new shape" arrow/button, the app defaults to an appropriate entity type given the context. Specifically, if I click the "create new entity" arrow on a narrative element, the default is to immediately create a new narrative element, rather than providing a menu from which I am required to select an entity/shape type. And the link should default to a generic "Causes" link; the user can change this later if they want.
The idea behind these defaults/simplifications is to minimize the extent to which the app pops up and requires that the user do something, which creates "friction" and interrupts mental flow.
A related default is that if I double-click on the canvas to create a new entity, the app should create an entity of the default kind given where I clicked. E.g. if I'm in the "swim lane" region for a narrative, it should give me a narrative element immediately, rather than giving me a menu and requiring that I select something.
Of course, to do this we would have to have the "regions" concept implemented - which will probably have some challenges of its own