When you click on customizer from the appearance tab, it will redirect you to customizer page and the first tab below your active theme indicator is the general settings.
Inside the General tabs options are:
- Site layout
- Main Wrap Size
- Content Wrap
- Responsive Option
- Menu Responsive Breakpoint
- Preloader Enable/Disable Option
- Preloader Style Options
- Preloader Animation In
- Search Text Input
- Email Input
- Telephone Input
- Custom Text Input
- Shortcode Input