How to increase scrollviewer/scrollbar width?

Mar 7, 2014 at 6:10 PM
I'd greatly appreciate if someone can help me with the following for my WPF/XAML. Currently the scrollbar is a bit too narrow to easily get the mouse over it.
  1. Increase the width of the scrollbar on a scrollviewer
  2. Increase the width of the scrollbar on a listbox
When I try the suggestions online to set the width, the elysium theme gets overridden and I get the old style scrollbar.