When a viewer comment is added as an overlay, use this setting to automatically hide it after a given number of seconds. When this setting is activating, the overlays will also be hidden automatically after changing Scenes.
To turn on this feature choose Preferences from the Ecamm Live menu at the top of the screen beside the menu. Then, check the box next to Automatically Hide Comment Overlays After 10 Seconds. The default is 10 seconds, which can be changed.