Thread:Project:Support desk/Where is the watchlist maximum days site variable configured?

I saw somewhere in the manuals a mention that users can choose watchlist durations of up to 30 days "depending on wiki." Our wiki, version 1.16.2, only allows 7 days at present. The man page here on variables for LocalSettings.php has no variable with "watchlist" in the name that appears to be about the duration to be made available.

Also, as a suggestion, it's suboptimal interface design to have a text area for a constrained choice like this. It would be better as a list, on which only allowed numbers of days are presented as user choices, to minimize confusion.

But fixing that isn't my current goal, just finding where to reset the variable, since we have people who want a watchlist duration choices beyond 7 days.