I'm glad to see you here in the Community, kidcurry0124.

Let's get your QuickBooks Online fonts changed.

If you wish to change the font size for better viewing of your QuickBooks Online, you can hold the "Ctrl" key and press the "+" sign simultaneously on your keyboard. Or, you can hold the "Ctrl" key and then scroll up.

However, if you want to increase the font size on your printed sales forms in QuickBooks Online, you can edit it in the Custom Form Styles window.

Here's how:

1. Go to Gear icon at the top right.
2. Select Custom Form Styles.
3. Look for your form style, and then click Edit.
4. Go to the Design tab.
5. Click on the Select a different font option.
6. Select your desired font size. We have three choices available: 8, 10, and 12pts.
7. Click Preview or Print to see how your form would look like, and then click Done. 

This will get you going, kidcurry0124. Let me know if you have additional concerns about QuickBooks, I’m here to assist you further. Have a great day!