Check out project files for editing
Check project files out of source control in order to edit them.
To perform this task, you must be connected to your collaboration server.
If you open a file and make any change, then it is automatically checked out.
Otherwise, to manually check out a folder or file:
In the Project Explorer, right-click the folder or file that you want to check out, and then click Check Out for Edit on the shortcut menu. If you right-click a folder (e.g., Screens), then you will check out all of the files in that folder.
Files checked out for editing are marked with a green “check” badge.
Figure 1. “Check Out for Edit” badge
These files must be checked in to make any changes permanent.