Maybe you want to just change the size to make the font bigger or smaller, or change the font to one you like better. To change the font settings for your message list, open Outlook and click on the View tab. Click the View Settings button in the Current View section of the View tab.On the Advanced View Settings dialog box, click Conditional Formatting button.aybe you want to just change the size to make the font bigger or smaller, or change the font to one you like better. To change the font settings for your message list, open Outlook and click on the View tab. Click the View Settings button in the Current View section of the View tab.