"Presentation mode" for Diagrams
Allow user to group diagram components together and show them simultaneously in "appear events"
This way a model and diagram can be easily made into a presentation that shows only minimal components first, then upon stepping forward in the presentation shows the next group.
Looking at a diagram as-such for the first time can be overwhelming, which is why a presentation mode could be useful.
Presentation mode could include comments and should be exported with a model. This could be used for new users to understand a model better, but also for showing in live-situations demonstrations etc.