It's not an option here, sorry. There are two modes - "flat view" and "tree view" - which are selected by a button at the bottom right corner of the screen, right by the "new topic" and "post reply" buttons.
Yes, it would be a handy option. Threads are displayed in latest-first order, but the posts within each thread are displayed in chronological order. Might be nice to be able to reverse that to latest-first, just like the order of the threads.
I have a little daily habit. I actually usually do it three or four times a day, but certainly first thing when I start to work each day. I look at all of my email accounts, and respond to any new messages. I mark all that don't need responses as "read" too. So that sort of "clears out" my inbox queue. I then look here for any forums that have glowing vacuum tube icons, meaning there's something new in that forum that I haven't read. I click into each forum that has a glowing tube and look for thread folders that are red. Those show me threads with posts I haven't seen yet. I click into them and go to the last post(s) to see what's new. If I need to respond, then I do. If not, at least it records my activity and clears the red folder and glowing tube icons. Makes it easy for me to see what's new next time I visit.