Adding underline to UILabel attributed string from the storyboard fails

Here is the solution in storyboard:
Open the Attribute Inspector (make sure label is selected), Change the dropdown value from ‘Plain’ to ‘Attributed’. Now a a small text editor will be visible under the font of the label. Select the text of the label, right click and change the font to ‘underline’.

I also have attached a screenshot and successfully underlined a text using storyboard in XCode 7.0.1