Thank you feuer1 and odoaker2015!
It is indeed the "Preview" button that brings up those controls I am looking for: "Your Move," "Next Chapter, Play Again, Analyze" for good moves, and "Retry" for bad moves.
And from the tutorial video, I saw that the controls I want will appear without the Preview button if the Study is opened by someone other than the Creator. That is why I immediately see the control buttons when I open Yuhan's Studies, but have to press "Preview" to see those controls on My Studies.
Thank you feuer1 and odoaker2015!
It is indeed the "Preview" button that brings up those controls I am looking for: "Your Move," "Next Chapter, Play Again, Analyze" for good moves, and "Retry" for bad moves.
And from the tutorial video, I saw that the controls I want will appear without the Preview button if the Study is opened by someone other than the Creator. That is why I immediately see the control buttons when I open Yuhan's Studies, but have to press "Preview" to see those controls on My Studies.