Merged call tree shows a top-down call tree of all applications threads merged together into single tree. The cumulative time and counts of the same methods called from different threads will be shown.
CPU call tree respects filter settings and collapse filtered methods. Filtered method are marked with non-filled arrow icon and there is <...> hyperlink which allows to expand hidden content. You can always undo unfiltering by using the Ctrl+Z shortcut or from popup menu.
The following actions are available in main application menu and in the popup menu: