Cylinder by Radius To create a cylinder by radius: 1. Click the Cylinder tool from the 3D Modeling tool set, and select Circle by Radius mode. 2. Click to set the center of the cylinder base. 3. Drag the mouse to the desired radius and click to set the radius of the cylinder base. The radius can also be set in the Data bar. 4. Move the mouse vertically and click to set the cylinder height.