Click the mouse on the square where you want to place a disc. The Highlight Legal Moves option helps you to find a move by drawing a dot on squares where you can move.
The board can be spun left or right and tilted up or down with the arrow keys. You can also do this with the mouse by clicking on the window and dragging. The board can be locked in place via an option in the View menu, which may be useful if you find yourself accidentally moving the board when clicking to make a move.
If you hold the Shift key while a disc is placed by either yourself or the computer, the disc placement and flipping animation will be done in slow motion.