The Perspective Grid Feature is a nice addition to Illustrator CS5. With any new feature, it’s a good idea to get familiar with keyboard shortcuts so you can use the new feature more efficiently and cut down the learning curve. One tip that is helpful when using a perspective grid is to quickly toggle a perspective grid’s visibility.
Toggle a Perspective Grid’s Visibility
When using the Perspective Grid Tool (Shift +P) or the Perspective Selection Tool (Shift +V), hold down the Alt / Option key, and click the one of the any of grid plane widgets to toggle between line, solid, and invisible. Take a look at the images below to get an idea of where the grid planes are and the difference between line, solid, and invisible.