In RF-/STEEL EC3, there is, therefore, a graphical display of the structure in Window 1.7. The display of the structure is interactive; you can zoom into and move the graphic. The buttons below the graphical display are very useful. You can use them to hide the rest of the structure or show it in the background. We recommend, in particular, showing the local coordinate system of the set of members, including the supports defined in Window 1.7. Thus, you can easily avoid errors when defining the boundary conditions.