title: How to remove grey color line from CANVAS in the jSignature plugin?
body: <p>How to remove grey color line from CANVAS (Signature panel) in the <code>jSignature plugin</code> ?</p>
  
  <p>Is there any option to validate whether user enter signature or not ? Any built in function for this ?</p>
  
  <p><a href="http://willowsystems.github.com/jSignature/#/demo/" rel="nofollow">http://willowsystems.github.com/jSignature/#/demo/</a></p>