Adding files to the Toolbox library

Good day!

I have a following question: It seems that my Toolbox library is missing some standards that I need for work. For example I need a DIN 94 pin and there is no such standard in my Toolbox. How can I add it and have the possibility of choosing between properties of the chosen part (size, thread etc) when adding a part to the assembly.

Best regards

SolidworksToolbox