The "Props" frame contains a table with a list of input props. Adding props is performed in the "New prop" dialog window. The input props can also be edited on the desktop with the help of active dimensions or by active objects.
The prop is introduced on already deformed structure automatically (obtained from the previous stage of construction). In subsequent stages the props can no longer be edited, it's only possible to change stiffness of props. In the analysis props are modeled in the same way as anchors but with the initial force equal to zero.
Note: The program doesn't check the prop bearing capacity neither for compression or for buckling.