RMB supppress/unsuppress option missing for parts within sub-assemblies

I'm sure that this is something simple and is probably OE, but the supppress/unsuppress option is missing from the RMB pop-up menu for parts within sub-assemblies.  This is true for one workstation but not another on which everything is fine.  I have looked here and in every application menu that I can find and can not find an answer...any ideas?

SolidworksAssemblies