You must keep in mind that:
an Outline is always necessary in your Layout
all the other Elements of your Layout must be enclosed by the Outline
there can only be one Outline Element in your Layout.
The Outline templates that are currently supported:
Rectangle: height and width (both in mm) are needed. In case you select to add rounded corners, you also need to specify that curvature radius (in mm).
Circle: radius is needed (in mm)
Ellipsoid: radius a and radius b are needed (both in mm)
Trapezoid: you need to define base and height (both in mm) and angle 1 and 2 (in degrees)