hi, I want to make new components in the toolbox but I can't find a way to make standards for added parts. all I can do for now is to make configurations but it will only allow me to choose between configuration names when I want to use the part, instead of choosing different parameters like for examples available length and sizes.

one way to do this is by copying a similar standard component and change its default values but my parts our completely custom made and I can't find anything similar to them