To draw arrows on the board, simply hold right click to make the arrow and release it when you're done. You can right click on a singular square to highlight it or draw arrows from square to square. Here are a couple more details:
https://support.chess.com/article/702-how-can-i-draw-arrows-on-the-board-like-streamers-do
As far as I know, you can't draw arrows or highlight squares on mobile devices.
How to draw arrows on iPad
Unfortunately, you cannot draw arrows on mobile devices with Chess.com. For desktop devices, you simply right-click to draw gold/yellow arrows. I made a video showing how to draw all four different arrow colors if you feel like checking it out. https://youtu.be/IaacHwmEHM8
Hope this helps!
I would like to draw some arrows to show chess moves. Does chess.com’s chessboard support this feature?
Thanks,
CLBNCC