Hi Tracker users,

A new version of Tracker has been released. To upgrade, click the green "Now available" button on the toolbar and choose Upgrade Now. If you don't see the green button choose Help|Check For Upgrades.

You can also download installers directly from the Tracker home page (http://physlets.org/tracker/) or ComPADRE (http://www.opensourcephysics.org/items/detail.cfm?ID=7365).

New features in this version:

--new highlight/shadow video filter enhances highlights or shadows
--expanded shape choices for RGB regions: ellipses, rectangles, freeform polygons
--new datatable time view displays line profile data that varies with time
--parameter uncertainties are now determined for all fit functions

Thanks! Doug