Milling Tool Holder Lbrary - Add New Category

Just getting started with Bob Cad and have been unable to figure out how to add a new category of holder.
The existing default categories are Cat 40, Cat 50 and Bt40.
I need to add R8 and quick Change aka TTS.
The help system provides info on holders, arbours and tools but I can't find anything on categories.
Any suggestions would be appreciated.

Thanks, John

CAM Part-Milling Tools, right clcik and choose "Holders". Add Holder and the holder description is "catagory"?

Burr is correct. Click 'add holder', name it, (IE:R8), then walk through the setup to make it to proper dimensions and shape.