Set svn:needs-lock property Setting svn:needs-lock on a file specifies that only one user can modify it at one time. Use SCM > Properties from the right-click context menu on a file to make changes to SVN properties. Use the plus sign to add a new property. Select svn:needs-lock from the Property name list. Set the Property value to *. Figure: Set svn:needs-lock Related concepts SVN Lock dialog