The Storyboard feature works when you are viewing a single channel. Open the player and click on the <Storyboard> icon at the upper right corner of the player. The player will reduce in size and move to the left. The right hand side of the screen is populated with storyboard thumbnails. Use the icons at the top of the storyboard to select the storyboard duration and to move forward or backward in time.
Click on a thumbnail to have the player move to that frame. To exit click on the in the upper right corner of the screen.
You can create bookmarks in Storyboard view. Click on a thumbnail to mark in the beginning of the bookmark and a later thumbnail to mark the end. Once created processing is the same as other bookmarks.