I'm wondering if it is possible to make it start from the post where I left when I revisit the topic/thread.

I find that it will start from the first page of the topic/thread (e.g. this topic/thread - forum-tmo) when revisiting. Of course I can choose to jump to last page but I may miss quite a lot of posts in between and need to go back and find where I left last time.

Edit: Just found out that it can go to first unread post by press and hold for a while on the desire topic/thread.