Visual Studio has a very useful set of plugins that add a code preview scrollbar to the editor. Plugins like Rock Margin, Metal Margin, and Metal Scroll not only show you a visual preview of the code in the scrollbar, but also can show colored markers showing all the locations of a word you doubleclick on. I've attached an image just in case my description wasn't so descriptive
What would it take to get one of these into SlickEdit? I love the editor but this is the one feature keeping me from switching full time from Visual Studio.