how to expand or collapse all groups in event viewer

I've been needing to check the event viewer lately, and when I show in groups, there's a small arrow that lets one collapse each group, and then you see a summary of how many events are in each group.

But to collapse all of them I have only found the tedious way by doing each individually, which involves a lot of scrolling and clicking. There must be a collapse all command, isn't there?

Ahhh, Nirsoft, used them before. Nice program fulleventlogview. - Thanks!