More Control Over Custom Properties in Parts & Features in SW 2018- Clarity Needed

Hi All,

I am now testing the SW 2018. I have some functional clarity with More Control Over Custom Properties in Parts & Features which is available in the What's New Document. How this feature works ? Since every time i'm getting Greyed out icon next to the Link symbol.

Regards,

Vignesh

SolidworksSolidworks 2018 Beta