Mark Files for Addition to Source Control
When you create a new file in a folder under source control, the Not Under Source
Control symbol 
appears in the status column of the Current Folder
browser. To add a file to source control, right-click the file in the Current Folder
browser, and select Source Control and then the Add option
appropriate to your source control system. For example, select Add to
Git or Add to SVN.
When the file is marked for addition to source control, the symbol changes to Added
.