The total panel contains the following fields:

Log Entries

The total number of messages you have selected in the Log view.

Delta

The total difference in time between the function called first and the function called last amongst the selected functions. Use the totals panel to easily see the time gap between two messages by clicking on one and holding Ctrl and clicking on a second. The value in the Totals Panel Delta field updates to show you the time difference between the two selected messages.