User interface

This article will help you to set up appearance of basic User Interface Components (Form elements, buttons, tables, tabs, accordions etc). If you'll need advanced elements settings, you can configure them in Elements Styling section.
Appearance ▸ Customize ▸ User Interface

'Prior Settings' article should useful for you and will help to understand the meaning of these settings.

General

Such settings are available here:

• Minimal height
• Typography (using of default Typography settings setting available here)
• Font type
• Font size
• Text transformation
• Letter spacing
• Alignment
• Icons and controls
•  Icon library
• Size
• Indents
• Indents
• Margins
• Paddings
• Animation 

Behaviour

3 behavior types could be specified here:

• on Hover
• on Click
• on Focus

Each of this type has such settings:

• Shape & borders
• Colors
• Background
• Inverted background
• Shadow