You can also try: Profile>Modify profile>Look &Layout ("Theme"), then be sure "Show most recent posts at the top" is checked.
If you do that, you'll invert the threading - 'show most recent posts on top' puts them in reverse order - last first and first last.
-Pat
It is what the thread starter asked how to do. Since it doesn't affect how posts are arranged on your machine, why is it a concern?
Well, yes, but he also asked to be taken to his
last read post, which I interpreted as his primary interest. This method doesn't to that - it takes you to the last post in the thread, but puts it first, in reverse order. If several posts have been made since the thread was last accessed, the last post read will still be buried in the middle somewhere, just closer to the top than the bottom.
-Pat