On the left side of the window is the heading "Where Current BC is", followed on the next line, in this example, by the word "all". Below that is a scrollable list box containing, again in this example, the two entries "all" and "UNDEFINED".

On the right side is the heading "Change BC to", followed on the next line, in this example, by the words "VISCOUS WALL". Below that is a scrollable list box containing the following entries:

• UNDEFINED
• REFLECTION
• FREESTREAM
• VISCOUS WALL
• ARBITRARY INFLOW
• OUTFLOW
• INVISCID WALL
• SELF CLOSING
• SINGULAR AXIS
• MIXED AXIS AND WALL
• COUPLED
• CONNECTED
• BLEED REGION
• PINWHEEL AXIS
• FROZEN

At the bottom left are "Continue ..." and "Finish" buttons, and at the bottom right is a "Cancel" button.