You can view the list of the recently created and modified bugs by selecting Show Recent Bugs from the Connection menu (or pressing CTRL + /).
The recently added bugs are highlighted with bold. The modified bugs are shown with no highlighting.
The buttons on the toolbar allow you to:
Hover over the buttons in the toolbar to see the tooltips explaining buttons actions.
The bugs are added to the list until it gets full (20 bugs). After that the older bugs are pushed out by the more recent bugs.