Marking all posts as read

Hi.
I know I can mark the posts in a single forum forum as read with the Tools button, but how to perform that to the whole forum at once, please?

Thanks and sorry if it was answered previously, didn't find it.
François

Hi.
I know I can mark the posts in a single forum forum as read with the Tools button, but how to perform that to the whole forum at once, please?

Thanks and sorry if it was answered previously, didn't find it.
François

Bottom of the home page "Mark all read"

Hi.
I know I can mark the posts in a single forum forum as read with the Tools button, but how to perform that to the whole forum at once, please?

Thanks and sorry if it was answered previously, didn't find it.
François

Ok, thanks Dave!
Would be more convenient to have a Tools button at the top, in the index view though. 

Ok, thanks Dave!
Would be more convenient to have a Tools button at the top, in the index view though. 

Probably true, but a very small inconvenience to enjoy this great forum

I'm looking at potentially changing forum softwares in the near future so we'll revisit this if that changes.

Merci Andrew.