I'd like to share some steps where you can change the fonts, Ginger01.

For your sales forms, you can open the template to update the font. 

Here's how:

1. Go to Lists > Templates.
2. Right-click on the template and select Edit Template.
3. In the Basic Customization window, click the Change Font button.
4. Change the Font Size and click OK.

Please see this sample screenshot for a visual guide:

To change the font size on your reports, you can follow these steps:

1. Go to Edit > Preferences.
2. On the left panel, select Reports & Graphs and select Company Preferences.
3. Under Default formatting for reports section, click the Format button.
4. Click Fonts & Numbers and select Change Font.
5. Change the Font Size and click OK.

Please see the sample screenshot below:

You can also check this article to change your Windows DPI and screen resolution: QuickBooks Desktop display issues. 

To check for other guides and articles, please feel free to browse for a topic in our general support page.

If you have any follow-up questions or other concerns, please let me know by leaving a comment below. Take care and stay safe.