To create a View go to the Modeling tab at the Ribbon.
Click on "New" in the Views Ribbon group. Dependent on your current environment you'll receive the following dialog:
First enter a unique name for the view. Then specify the creation mode:
- Original Diagram
Create a view which contains all Elements of the underlying original diagram. This option is always available
- Copy of View
This option is only available if you try to create a view while you're currently editing a view.
If you choose this method all currently selected elements will be shown on the view. All other will be hidden. If you choose this option and do not have selected any object, the resulting view will only contain hidden elements which may later become unhidden.