To anyone else that runs into this problem, I just stretched the element to fill the screen, and then set the anchors to the corners of the screen (so that it resizes correctly) - it would seem that only direct children of the canvas have an anchor.
To anyone else that runs into this problem, I just stretched the element to fill the screen, and then set the anchors to the corners of the screen (so that it resizes correctly) - it would seem that only direct children of the canvas have an anchor.