>>18364
Here's what those options do:
Lock: prevents posting in the thread.
Pin: sticky, pin the thread to the top, so no matter which thread gets bumped it will stay on top of the first page
Cyclic: never tested this, so not entirely sure, something liek keep the thread forever going, it never reaches bump limit, it gets pruned from the beginning (perhaps)
When a thread reaches bump limit, which is 500 posts, it gets autosaged, new posts won't bump the thread. This can be customized by the BO by setting Reply Limit, description says:
>autosage after this number, lock thread after twice this number
That's it.