Can I enlarge the billing address space or make the font smaller?
Rustler is right. The good thing is I have an option for you. You can import an invoice template with a wider billing address field. If this is your first time to import one, you can practice using the downloadable sample template.
First, enable the option to import templates:
Click the Gear icon and choose QuickBooks Labs.
Enable to Import style option.
Second, download the sample and upload it:
Click the Gear icon and choose Custom Form Styles.
Click New style and select Import style.
Select a form type.
Click on Download instructions and samples in blue texts.
Open the downloaded folder and open the Invoice-Airy-Pro-US file.
On the invoice page, click the Billing address section to see the table-settings icon.
Click that icon and make the borderlines visible.
Widen the width of the INVOICE TO/ Billing address column, and make the borderlines invisible.
Save the template and import it back to QuickBooks.
To use the template on your transactions, just click on Customize at the button of the transaction page. Then, select the name of the template.
That's it. Give it a try, and let me know how it works for you. Have a good day!