Link cursors in lower Zone

I am trying to link the cursors in the upper and lower zones. The manual says that I can via a tool that looks like a chain link. This tool does not seem to exist anymore. Using Setup lower zone does not help.

It’s part of the Auto-Scroll item. (that’s my custom keystroke, btw)

Could be operator error, but I can’t seem to get the link command to show up. Using 10.5 Pro.

Never Mind, I just figured out that it doesn’t work when editing audio events. Darn the bad luck.