How to draw on an image

Start by right clicking anywhere on the image, go to the Edit menu and choose "Drawing"
Adjust the drawing region
When you're ready to start drawing, double click anywhere inside the drawing region to activate drawing mode.
Go to the drawing toolbar for different color and size options
If you make a mistake, use the eraser tool to make changes
Once you're done with your drawing, click anywhere outside the drawing region to exit drawing mode.
You can now print or save the finalized image with the drawing.