The frame "Geometry" contains a table with a list of input beam sections. Adding points is performed in the "New segments" dialog window. The window requires defining the section length, width and height (for rectangular cross-section). The program allows for defining a general cross-section of a beam (cross-sectional area and moment of inertia are specified).
Material of the cross-section is specified next, either using the program catalog, or by entering the material parameters (modulus of elasticity, shear modulus, self-weight).