You can use styles to format text in rich text documents. Styles can include font type, color, and size, and paragraph and line spacing.
Apply a style: Select text, click the Paragraph Styles button at the left end of the toolbar, then choose a style. If your Mac has a Touch Bar, you can tap it to apply bold, italic, or underline.
Preview styles: Click the Paragraph Styles button in the toolbar, then choose Show Styles.
For more information about the Styles pane, see Format text in documents with fonts and styles.
View all instances of a style in a document: Click the Paragraph Styles button in the toolbar, then choose Show Styles. Select Document Styles or Favorite Styles, locate the style you want to find using the controls, and click Select. Then click “Select within entire document” or “Select within existing selection” and click Select.
Reuse a style already in a document: Select the text, choose Format > Font > Copy Style, select the text to reformat, then choose Format > Font > Paste Style.
Make pasted text match the text around it: Select where to paste the text, then choose Edit > Paste and Match Style.