The FeatureManager design tree contains the feature (f) knee<1>. Because this is the first component inserted into the assembly, knee is fixed (f). It cannot be moved or rotated unless you float (unfix) it. The <1> means that this is the first instance of knee in the assembly.
The assembly also contains an empty Mates
folder. This folder is a placeholder for the mates that
you add later.
Click View, Origins to clear the origin from the graphics area.
Click Window, knee.sldprt., and close the part document.
The assembly remains open.
