PM means private message. You can find that top right under Notifications, the new page will have a menu on the left with options to create a new message and other neat things.

HJ Sandman had a black rectangle on the rear. There are some great examples in the Gallery (Top menu) or in the HJ Showroom.

Have patience with stickthis, he will get to you but unlike some he does not drop in here every day, but at least 2 a week.