I understand that you want to draw arrows in your game. I also saw a few streamers drawing arrows on their board and it looked awesome!
It looked like this:
You can do this on any board automatically, except in Live chess. To enable this option in Live chess, click on the gear icon next to the board:
Then toggle the switch to draw arrows and highlights. Don't forget to click save!
To draw an arrow simply right-click and drag your mouse across the board in the direction you want the arrow to point. Please see here for how to right-click on a Mac if you don't have a two button mouse!
To draw a knight's move arrow, click and drag over the squares you want the arrow to cover. When you let go of the right mouse button the arrow will appear. The point of the arrow will be wherever you let go of your mouse button.
Try it on any board on Chess.com to practice!
You can also highlight squares in red or green color:
Right Click on the square to turn it red.
Control + Right Click on the square to turn it green.
To clear all arrows and colors from the board, simply left-click anywhere on the board.
Awesome, right?
Edit:
For different color arrows, try holding Shift or Ctrl or Alt while drawing it.
How to draw different color arrows and highlight squares with other colors?

Did chess.com remove the option to draw colored arrows on here? I used to be able to, but haven't been able to draw colored arrows for a few months now. Anyone else having the same problem? (I can't do it in analysis mode or any other mode)

To change the color of the arrows or the color that you want to use to highlight a square, use ctrl, alt, and shift. Using these commands while dragging the arrow will make it blue, green, or red.

right click => orange arrow
ctrl + right click => red arrow
shift + right click => green arrow
alt + right click => blue arrow

this how many colors i can highlight
Highlight Squares:
To create red square ==> RMB
To create green square ==> shift + RMB
To create blue square ==> alt + RMB
To create yellow square ==> ctrl + RMB
you hold alt or shift and drag ur mouse, it will make blue and green highlights