Study options available on Courses
For opening courses, the default is set to 'All Moves,' allowing you to study every move in the variation.
For strategy, tactics, and endgame courses, the default is set to 'Key Moves,' which skips non-essential moves, allowing you to focus on repeating the basic moves (e.g., 1.e4 e5) when learning new variations.
If you change this option, it will only apply to the specific course you’ve set it for.
Check out this article to learn how to switch between study options: How do I study entire variations instead of just key moves?