There are three predefined button styles (fig. 1): flat, 3D, shadow.
In this Theme Options tab, you can also specify:
- button idle and hover colors for background, text and border (fig. 2);
- font family and font size, padding and border radius for 3 button sizes (small, medium and big).
Settings from this page affect buttons in all standard forms (comments, contact form, etc.) and some third-party plugins (WooCommerce, Contact Form 7, etc.).
Note that when you insert a button via WPBakery Page Builder you can further customize it through WPBakery Page Builder interface.