Show or hide all panels
You can decide to show or hide all panels at the same time in the Microsoft Expression Blend workspace. This is helpful if you need more room to work on the artboard. Alternatively, you can Add or remove a panel, or Zoom the artboard in or out.
Press TAB or F4.
If you have an object selected on the artboard when you hide panels, the Properties panel appears in mini mode on the far right, with buttons that will expand to show the corresponding category of properties. For more information, see Properties panel.
Using TAB will not work if your cursor is inside an editable text field.