You can select the checkbox to the left of a Folder and click the Test Cases Chart Automation Percentage link to display a chart of the breakdown of automated vs. manual vs hybrid test cases.
This will display a pie chart showing the number of automated, manual and manual hybrid test cases as a percentage and also in numbers of individual test cases. The example below shows 1 2 manual test case cases (53.9%7%) vs 16 51 automated cases (94.1%).4%) vs 1 hybrid test case (1.9%)