In examine mode, Lantern can display circles and arrows. Users (as of version 5.45) can also draw circles and arrows with the mouse, instead of typing the circle and arrow commands.
While examining a chess game, a right-click on a square draws a circle. To draw an arrow, the user can hold down the right mouse button on the origin square and then release on the destination square. A change in the examined game's state, such as playing a move or going backward, will clear the circles and arrows from the board (note that Lantern did not delete circles and arrows when going backward until version 5.46).
While playing, right-clicking still cancels premoves and, for a Click Click move, returns a grabbed piece to its original location.