I used the collapse all items icon/button on my Outline+Agenda view and it did what you would expect. Now all my items in this list are collapsed. However, I fully expected to be able to click this icon/button again to ‘uncollapse’ all items - but clicking again does nothing 😒.
It seems that my only option is to manually go through each item in the list, manually expanding it. But I’ll have to do this forever as this is an agenda view! Seems to me like this icon/button should be a toggle between ‘collapse all’ and ‘uncollapse all’?