changing default 'display options' (for forum listing)
 

I wouldn't normally ask, but this is now bugging me to death...

I can't find - anywhere - the settings for default display options (for a forum listing). Currently, they're defaulted to 30 days and I have to keep manually using the pull-down menu and selecting 'from the beginning'.

My other forum is set default 'from the beginning' but I can't find it on 3.8.4 (pl2) anywhere - would anyone care to give me a nudge in the right area please?