I have heard quite a few folks ask questions about how to use their keyboard more when using the Entity Designer. Many people can be more productive if they are able to use more of the keyboard (reduce mouse clicks). Fortunately, Visual Studio has ways to make keyboarding easier. In addition, the Entity Designer has its own built-in keyboarding support. Finally, the DSL Toolkit (the component that provides the boxes-and-lines Entity canvas) also has built-in keyboarding support.
Let's start with the DSL Toolkit. This component has a number of nice keyboarding options discussed by Garethj over on his blog. These keyboard shortcuts can be used when the Entity canvas is currently selected. I will make note of one in particular which is the INS key. If you select either the "Scalar Properties" compartment header, or a Property itself and hit the INS key, it will add a new Property to the Entity.
Next, let's cover VS keyboarding. Each menu item in every Entity Designer context menu is treated as a Visual Studio "command" and you can assign your own keyboard shortcut to it. Just click on the Tools menu, then Options. Under Environment, choose Keyboard. Scroll down the list in the middle until you see "OtherContextMenus.MicrosoftDataEntityDesignContext". Here you will see the list of commands that you can create keyboard shortcuts to. Let's map some keystrokes for creating a new entity and a new scalar property.
Now, open up a blank EDMX model. Type Ctrl-E, Ctrl-E and you should see the New Entity dialog. Type the Enter key to accept. Now, type ">" to move into the shape (using hints from Gareth's post above). Type Ctrl-E, Ctrl-P to add a new scalar property. You can expand on this, defining the keyboard shortcuts that make the most sense to you and that help you be productive.
Finally, the Entity Designer has some custom keyboarding defined in the Mapping Details window. To try this out, open an EDMX file that has a number of entities and mappings (or quickly reverse engineer a model from your database). Use this sequence to change focus to the Mapping Details window:
Now that the Mapping Details window is shown, hitting Tab will switch between the main window area and the toolbar on the left:
Happy keyboarding!