I am using SharePoint 13. I am creating a Task List and a Custom List. I am attaching a resume as a Word file to the Task List and Custom List. Under Columns which type of column should I use to allow the team-member to see that the word document is attached? I was thinking of using Hyperlink or Picture. But perhaps there is a better option. By the way, I tried the Hyperlink or Picture but it's really not what I am looking for.

And what does "add to all content types" mean on the bottom of this option?

Thanks