It seems that the event frame that is opened when you see the logs of a rule doesn’t have a vertical scroll bar, so it’s not possible to navigate trough all of them:
I zoomed out the window and it seems that it’s paginated:
But as I said, without a vertical scroll bar the only way to see it it’s making the window smaller.
By the way, could be also possible to select all events and applying the same action for all of them? For example, cancelling all.