To set Styles of the button, click on the "Styles" option.
Click on the "Text style" icon.
Select a font family and set the font size, font weight, and spacing.
Set a text alignment and choose a color of the text.
Click on the "Background style" icon.
Set the background color of the button.
Click on the "Border" icon.
Set the border width, border style, and mode of border setting - individually or at once and set the border radius - same for all corners or individually for each corner.
Set the border color.
Click on the "Box shadow" icon.
Set the shadow blur, shadow spread, and shadow mode.
Set the horizontal and vertical direction of the shadow and choose a shadow color.
Click on the "Text shadow" icon.
Set the shadow size and horizontal and vertical direction of the shadow.
When everything is set, click on the "Confirm" button.