Pre-Production: Storyboards

Once everything has been finalized (story, story arc, concept designs etc.), storyboards can now be produced for the animation ready for the Production pipeline. A storyboard will tell the animators and actors/actresses what will happen in keyed frames (Numbered).
Here is the storyboard for the Batman Animated Series produced in 1992.

How the actions are displayed in this storyboard are shown with arrows and star like shapes, where the villians run away from the crime scene, when Batman swoops down, the arc of Batman's batarang being thrown and the direction of the villian's gun being knocked out of his hand. Sometimes, storyboards don't need huge details in them as it is Pre-Production but it needs enough information to tell the animators what happens exactly in the scenes.