Along with the new V4 version release,  Diigo annotation features went through another round of new enhancements.  Here is another cool new feature called “Highlighter Pen”

If you like to highlight several paragraphs on a page quickly, besides the usual highlight feature, another way to highlight with Diigo is to turn your mouse into a highlighter pen (very cool when you demo this):

1. Click the Highlight button on toolbar (without selecting text first).  When the highlighter pen is enabled, that Highlight button will become a Highlighter to indicate its status change.
   
2. You will visually see your mouse becoming a “highlighter pen”.  Use the pen to mark up area(s) that you’d like to highlight on a webpage.
3. When you are all done with highlighting on a page, make sure to click Highlight button again to disable the highlighter pen action

Here is a short video showing the Highlighter Pen in action: http://bit.ly/85Owyw