Legacy animations - loop time/loop pose not appearing

I'm working with Playmaker, which requires animations to be legacy. I'm aware that I need to use the loop time and loop pose options to make animations loop, but for some reason they don't actually appear in the animation menu at all. Since I'm really new to Unity, I'm wondering if I've missed a setting or I'm looking in the wrong place or something. If I haven't, is there another way to make animations loop? https://i.gyazo.com/a68e63be29a0dea8c8d78c9296b8d07f.png