Specify user segment as default in Visible To

I'd like it to be possible to choose a specific user segment that would be used by default for the user segment of newly created articles. By default, the system adds as a pre-selected segment "Agents and Admins" in the menu "Visible to". When creating an article, you have to manually select the segment you would like to apply in Visible to. Instead, I'd rather the user segment be specified once initially and then automatically for all new articles. Thanks!