I can't figure out how to make the posts on each thread show first to last instead of last to first.
I'm sure it's right in front of me but I can't find it.
Go to User CP (menu bar, top left). Under Settings & Options: Edit Options. Scroll down to Thread Display Settings. Also check out the bunch of other options on that same page, including one we remember requested on TOB, which was how many posts to display per page.
The default post display order setting in User Registration Options has been changed to "linear, oldest first". Out of the box, it's set to "linear, newest first". There are several options available when a user first registers that they may overlook, or not be sure what their preference is until after they've logged in and had a chance to look things over. The new default is what most seem to want, so we're going with it. It's also the view non-logged-in visitors see. This action will not affect how already-registered users have set their preference in their User CP.