Keynote selection can be applied to materials. Keynotes are assigned to materials in the Material Editor. To access the Material Editor, click Manage tab
Settings panel
(Materials). Select a material and click Edit. To assign a keynote value, click the arrow next to the material name.
When materials are assigned a keynote value, the objects that use these materials inherit the keynote value accordingly.
A great deal of time can be saved if the materials of a project have their keynote values applied before you apply keynote tags to materials. See Changing Material Identity Data.