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).