To change the font style used for quotes and authors, follow these steps:

1. Select the quote on the homepage for which you wish to substitute the font style.

2. Once a quote has been chosen, click the 'Open' button found in the quote's menu. This action will prompt the display page to open.

3. On the display page, click the 'Text' button.

4. Subsequently, press the 'Font' button.

5. Opt for either 'Quote' or 'Author' from the provided dropdown menu. Opting for the 'Quote' choice will alter the font style of the quote, whereas selecting the alternative option will modify the font style of the author.

6. Finally, click on your preferred font style to apply the changes.