It is possible to drag&drop elements between different models in the Model Explorer. It also changes the master view of said elements according to their location in the model tree.
However, the same cannot be done with diagrams. I have to open the context menu of the model, choose Existing Diagram and then select the diagram from there. I understand that this works better when moving a large number of diagrams from different source models to the same target model, but it seems to be an overkill when moving only one of them (or they’re already selected in Model Explorer). What was the general idea behind this limitation?