When adding/editing multiple instances of a component, the Group /Individual Control option enables you to have either Group control over all the instances (one set of parameters controls all the instances), or to have Individual control over the parameters of each instance. If a single component is added, the Group /Individual Control option is grayed out.
The Group / Individual Control toggle option is displayed in Add Component and Add From Catalog, when using the options:
Place by UCS
Place on Face - By Sketch
Place on Face - By Points