Can you remove the icon from data-rel="back"?

Can you remove the icon from data-rel="back"?

Hi, if I have a back button in the header of my pages set with the following code:

  1. <div data-role="header" data-theme="c" data-add-back-btn="true" data-rel="back">

Is there anyway I can remove the icon and how would I do it?

Also, using date-rel="back" can I reset it and if so how?

Thanks.