You do, indeed, already have this option, Captain
Bill. To the immediate left of the thread title, you will see a little blue box with a white check mark (see below, top).
Place your cursor on that little box, click, and you will be taken to the first unread post in the thread. Alternatively, if you click on the same little blue box with a white check mark to the right
of the name of the last poster to a thread, you will be magically transported to the last post added to the thread (see below, bottom).
Hope that helps.
PS: You must be logged in for the software
to "know" who you are so that it "knows" which post in a thread you last read.