Unable to Edit "Show to Customer" on Comments

We previously had an option to edit the Comments to "Show to Customer" or "Hide from Customer". It looks like that functionality is no longer available. We have many situations where a comment is added and the agent neglected to check the box. There are also situations where we need to hide comments where the discussion is internal to our agents and development team.

When we implemented your application everything was imported incorrectly and we have been working on cleaning it up, but now cannot.

The only way around it that we have found is to duplicate the comment. That creates a very, very messy thread.

Are there other options available?