I created a site column in a Content Type that's used by a List. The site column is listed with others from the same Source (Content Type). After that, the new site column is nowhere to be found: I expect to see it when creating a new item, but nothing. How do I get the new column to surface in the new/edit/update list forms?
Have you set this content type as the default content type to the list ? Go to list settings - advanced settings - > Allow management of content types - > Yes Go back to list settings - > change the default content type to your custom content type. Now try adding/editing the list item.