Change color

1. Select the shape (circle, square, Arrow, or Text), then click "Color" in the toolbar
   

2. Click the color you want, and the color will change. *For circles, squares, and Arrows, the shape itself will change color.
   

Change font size

For Text, you can change the font size. Use the icon below "Color" above to adjust it.

Change line width

For circles and squares, you can change the line width. Use the icon below "Color" above to adjust it.