Knee Brace
Within a job you can set whether it should use Knee Brace or No Knee Brace by using the Knee Brace option on the Building tab of the designer. Typically knee braces are used to provide strength at a lower cost. Using no knee brace will provide more accessibility in the top corners of the shed by using larger C-Sections but at higher overall cost.
This will change the connection for the current job only. The default option used for every new job can be controlled in the System Configuration screen.