Scrub the timeline (Blend for Visual Studio)
Scrubbing refers to manually scrolling through an animation, forward and backward, previewing your animation, pausing where you like in case you want to add a keyframe.
To scrub the timeline
Select the timeline from the Storyboard picker by clicking Open a Storyboard under Objects and Timeline and then selecting a storyboard.
Click and drag the playhead as you want, forward or backward.
As you drag the playhead, you will see the animation play out on the artboard.
See Also
Tasks
Change the snap resolution (Blend for Visual Studio)
Go to a specific point in a timeline (Blend for Visual Studio)