To change your password, go to the "
profile" button on the menu (which appears after you have logged on).

Also while you are there you can choose your
family crest, or one that you are researching (or an image of one that is on the internet). On the same page, if you
list the surnames you are researching in your "signature" then people can find these names when they carry out a search.
Have fun!
Trystan