Sorry to say, but I love Microsoft Visio. Plse do not spread the word. But from time to time, I had to create a document that served two distinct groups: a group who was just interested in getting a highlight and a group who wanted to go into details. In earlier times, I created two documents: one for the highlights and one for the details. But I then had to maintain two documents. A change in the highlights has to be introduced in the details as well.
This can be shown in next figure:
The highlights are included in the first layer only; the details are composed of the first and second layer. If you maintain this in two documents, you will have to introduce a change in the first layer in two documents simultaneously.
However, this is not necessary as Viso knows the concepts of layers. One could add some objects to the first layer and some to the second. Subsequently, one may choose to print either the first or the second layers or both. This can be directly started when several layers are created.
Take view>Layer Properties
Once the layers are created, one could add the objects to the layer. Take format>Layer:
This could make life easier.
I owe thanks here to gert-Jan Kooren who pointed me at the Vision feature: it allows us to create complicate diagrams, that can also be shown at a lower level of detail. Nice!