[Chimera-users] show CA as sphere and ribbon

Hi, I want show one of the CAs in a single protein chain as a sphere. But it looks like that I have to hide the ribbon to let the sphere show. Is there anyway that I can show the CA as sphere and also allow the ribbon to remain? I looked at the gallery and I didn't find anything that can help me, so here I am to ask for help from you again. Thanks first! Cheers! Luyuan