Create a custom section by drawing a section profile using a multiple segment line drawing element.

1. Draw section profiles using drawing elements such as lines, multiple segment lines, arcs, or shapes.
   

   fig. 1, Multiple segment line (left), Lines and Arcs (middle), Shapes (right)

2. In the Structural ribbon, select (Create Custom Section). Opens the Custom Section Editor. The Status bar prompts you with "Custom Section > Identify element".
3. Enter a unique name in the Name field.
4. Select the multiple segment line (fig. 1, left). Prompt: "Custom Section > Identify next element or reset to add opening".
5. Reset (right mouse click). Prompt: "Custom Section > Identify opening or reset to complete".
6. Reset again. A "Thickness Not Specified" warning dialog appears.
7. Click OK to close the warning dialog. In the Custom Section Editor, the Use Thickness setting is automatically turned on.
8. Enter a thickness value.
   All open profiles must have a thickness specified. The previous steps illustrate a common error and how to recover from it. Dismissing the warning dialog cancels the previous selections.

   Tip: The prompt reverts to "Custom Section > Identify element"

9. Select the multiple segment line again.
10. Reset twice. The new custom section is created. It is added to the Preview and the Available Sections in the Custom category.