Sometimes changing the ASP.net control name using the Property window is not allowed. In that situation make change directly in the html source.

The form has three labels and a default name assigned to it. The video shows how do change the label names using the html source.

Video steps:
1) The second control name is clicked
2) Html Source window is accessed
3) Then the label name is changed.

Same step repeated for last label control in the form.