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How to Display more items on Jump Lists
http://www.softwaretipsandtricks.com/guides/articles/21/1/How-to-Display-more-items-on-Jump-Lists/Page1.html
By Super Admin
Published on 06/13/2011
 
If you have a high pixel density screen, you probably can afford to increase the number of items that show up on the list.

How to Display more items on Jump Lists
For this,
• Right click on the Start button and Open properties
• Open the Start Menu tab
• Click on Customize
• At the bottom of the window, there’s an option to put “Number of recent items to store in Jump-lists”.
• Set it to whatever value you think will be sufficient while not intruding too much on screen real-estate. Experiment to your liking.