Here is a great storyboard panel from the She-Ra episode "The Unicorn King" by artist Keith Tucker. In truth the actual artwork of She-Ra acrobatically flipping would have been xeroxed from a book full of stock animation sequences in storyboard form. Keith would have then pasted the image onto his storyboard and drawn around it with the relevant background and laser blasts. Notice that he also drew around She-Ra on some poses to emphasize her movement.
(click on the image to see it at full-size)