There is an integrated Visual Editor provided by Document! X in Visual Studio that you can use to edit your source comments.
There isn't a way to import comments into source that you have already created in a Document! X Content File.
You can view the comments from your source whilst editing a Document! X Content File. To enable this option, click on the Properties toolbar button above the tree in the Content File editor and tick the 'Show content from source comments when editing' tick box. Once this option is enabled, your source comments will be visible in grey text when you are editing in the Content File.
Richard Sloggett
Innovasys
http://www.innovasys.com