Even if the animation of Star Trek was limited, it becomes clear that the creativity of the animators working under such conditions was not. In fact, there are more than a few instances where the animators managed to turn their weaknesses into strengths in some unexpected ways.

In this article, we’ll take a look at some of the tricks of the trade that Filmation animators used throughout the Star Trek animated series to save money or time on animation. Think of it as a mocking appreciation, like the way you’ll give your friends crap for their weird personal habits while realizing that it’s those weird personal habits that make them your friends in the first place. —Ace the Bathound
—A Note of Recognition for: Filmation’s ”Star Trek” Animators (Toon Zone News)

Thanks for the link, Rosemary.