buttonDisplay

Controls whether toolbar buttons display an icon, text, or both.

Accepted values:

• 'auto' - uses the icon if the current theme defines one, otherwise falls back to text
• 'icon' - icon only
• 'text' - text only
• 'icon-text' - icon on the left, text on the right
• 'text-icon' - text on the left, icon on the right

This setting applies globally to all buttons. To override per-button, use the display property within a buttons entry.