Styles (menu) /text/shared/menu/style_menu.xhp

Styles

Contains commands to apply, create, edit, update, load, and manage styles in a text document. Contains commands to apply, create, edit, update, load, and manage styles in a spreadsheet document.
Choose Styles.

Text styles entries

The entries includes most common paragraph, character and list styles. Click on the style to apply.

Cell styles entries

The entries includes most common cell styles. Click on the style to apply.
You can customize the list of styles entries using menu Tools - Customize. Because custom styles belongs to the actual document, remember to store the customized menu in the document scope.