Wirelessly posted (8700c: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry8700/4.2.1 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/102)
Originally Posted by NJBlackBerry
In the Messages folder, type "T" to get to the Top
Click the menu key and select "Mark Prior Opened"
Great feature that I use daily!