Working with Splines - MAXON CINEMA 4D R16 Studio: A Tutorial Approach - page 50

Figure 2-5 Choosing Rectangle from the Create menu
Cameras > Perspective from the Menu in editor view, refer to Figure 2-2. Choose Create
> Spline from the main menu; a cascading menu is displayed. Next, choose Rectangle
from it, as shown in Figure 2-5; a rectangle is created in the Perspective viewport. Also,
Rectangle is added to the Object Manager.
Note
The spline primitives are parametric in nature as their attributes such as height, radius,
and so on can be altered in the Attribute Manager.
2. Make sure that Rectangle is selected in the Object Manager. In the Attribute Manager,
make sure the Object button is chosen and then enter 121 and 465 in the Width and
Height spinners, respectively, of the Object Properties area, refer to Figure 2-6.
By default, the value of these parameters is set to 400. As a result, a square is created in the
viewport.
Next, you will extrude the rectangle.