It took me longer than I care to admit to find the Collection parameters section after the link in question didn't take me there. Not sure why I didn't start by searching for other instances of "collection" on the page, rather than assuming that the section must no longer exist and heading to the repo to try and figure out when it was removed, but... Oh well. This'll prevent anyone else from making the same mistake in the future.
It took me longer than I care to admit to find the Collection parameters section after the link in question didn't take me there. Not sure why I didn't start by searching for other instances of "collection" on the page, rather than assuming that the section must no longer exist and heading to the repo to try and figure out when it was removed, but... Oh well. This'll prevent anyone else from making the same mistake in the future.