You can Style an Element by:
Setting its Fill color.
Giving it a Border.
Adding a Radius to round its corners.
If you select the rounded corners for the Radius, you can set how rounded the corners are by changing the number. You can switch between applying the same Radius to all four corners, or a different Radius to each corner.
Adding a Shadow outside or inside.
Making it transparent by lowering the Opacity.
Please note that not all styling options are available for each Element.