This window lets you apply a Boundary Condition to an I, J, or K plane of the current Part.
The example shown is for applying a Boundary Condition to an I plane (input for the other planes is similar).
You cannot apply two different Velocity boundary conditions to structured beam parts.
The I plane and the J and K range.
Select the boundary condition you want to apply from this pull-down menu.
You can define Boundary Conditions by clicking the Boundaries button in the Navigation Bar, or you can click next to the pull-down menu.