Line loads from area loads on openings
This dialog box resembles the Convert Area Loads to Member Loads via Planes dialog box. In the upper dialog sections, you can define the different load parameters.
In the text box of the Openings with Area Load dialog section, you can enter the numbers of openings or select them in the work window with 
.
After clicking [OK], an overview with information about the generated loads appears. Then, click [OK] again to create the line loads on the edges of the opening(s).