I have one animation that loops, another that does not

…And I cannot see the difference between them in any of the settings. How does one set an animation to play once then stop, as opposed to looping?

This is a fairly common issue.

Try this:

  1. Select the animation that does not loop.
  2. Press Ctrl + D to duplicate the animation.
    2a. (Optional) Rename the animation to something memorable but different.
  3. Select your newly created/named animation (the duplicate).
  4. In the inspector, tick the Loop Time box.
  5. Depending on your situation, you may also tick the other box/adjust time offset.
  6. Replace your current animation with the duplicated one.

The reason that the animation must be duplicated, is because the old one is usually read-only, which means that it can’t be edited directly.

Good luck!