Submodels and callouts?

[Jaco van der Molen]

Thank you for your reply! I have saved it in .mpd with a model and a submodel, but I don't know how to add the submodel to the model. How does that work? Thanks!

What editor do you use? In MLCad the submodel should be listed in the Document section.
In LDCad you should look for it in the MPD content (the icon with the houses I think)
Then just click and drag the submodel to your model like it was a part.