How to change the Radius of the Rounded Rectangle Tool - Adobe Illustrator CS6 (Change how curved the corners are)

Having difficulties changing how round your corners look on your rounded rectangle in Illustrator? Look No Further

Hold down the shape button to reveal the menu and select Rounded Rectangle Tool




If you click once after selecting the tool, a toolbox will appear.
The third one down changes the corner radius manually.
The better way to do this is actually with the up and down directional keys on your keyboard whilst you draw the shape. You can do it live on the art-board and see how rounded you would like the corners.

Tip: Remember to hold down shift while drawing your box to have equal length sides.