hi pam,
page 257 in book "Serendipity" is about adding borders to blocks. sashing adds to all blocks in entire quilt.
also I find tech support to be quite good, and the video's built into the program is very good too. On my screen videos icon is at top towards the right end of all the icon kind of near work on quilt, work on block, if you look on page 301 in book you'll see the icons and you'lll know which icon you're looking for.
good luck
peel