The New Perspective Grid Tool in Adobe CS5 Illustrator
You can create and edit artwork based on a new Adobe Creative Suite 5 (Adobe CS5) Illustrator feature — the perspective grid. The grid is a huge help in creating successful perspective illustrations.
To show or hide the default perspective grid, press Ctrl+Shift+I (Windows) or Command+Shift+I (Mac).
Create a new document and turn on the perspective grid by pressing Ctrl+Shift+I (Windows) or Command+Shift+I (Mac).
You can use the Perspective Grid tool on the toolbar to fine-tune the grid.
Select a shape tool, such as the Ellipse, and click and drag it to create the shape on the perspective grid.
Notice that the shape’s perspective is controlled by the grid.
Select the Perspective Selection tool.
It’s the hidden tool in the Perspective Grid tool.
Using the Perspective Selection tool, click and drag the shape to see that it’s adjusted in position and location using the perspective grid.
Note that you can also select and drag the grid itself by using the Perspective Selection tool.
Choose View→Perspective Grid, and then select the type of perspective to apply.
In this step, you further customize your grid and choose other options to make your illustrations more precise.