In most cases, a single-click selects an object while and a double-click dives on the object. However, if the field is editable, TotalView enters edit mode, so you can alter the selected item's value.
In some areas, such as the Stack Trace Pane, selecting a line performs an action. In this pane, TotalView dives on the selected routine. (In this case,
diving means that TotalView finds the selected routine and shows it in the Source Pane.)
Selecting the icon a second time deletes the breakpoint. If you change any of the breakpoint’s properties or if you’ve created an eval point (indicated by an
icon), selecting the icon disables it. For more information on breakpoints and eval points, see
Chapter 16, “Setting Action Points”.