How can I change the thread title after the thread has been posted? There must be a way but I just can't figure it out
Oops! Did I inadvertently give you moderator-only method? My bad. Hard to tell sometimes. There's a way you can change (or there used to be anyway). Let me nose around and see if/how that capability exists for you.
OK, let's try this: at bottom of pane, your first post in thread, click EDIT; then click OTHER OPTIONS; IF resulting screen shows a box with thread title, you can edit there.