Navigate to the tab and click the Customize button.
You can "pin" specific documents to a Jump List so they remain at the top for easy access, even after they would normally fall off the "recent" list. File Location & Management Windows 7 Recent Documents List
Hover over or right-click a program icon on the Start menu or Taskbar to see files recently used with that specific application . Navigate to the tab and click the Customize button
on an empty space on the Taskbar and select Properties . Windows 7 Recent Documents List