Thanks for visiting the Community, @nykke.
The new test templates default font as you open it is set to Courier. You can select the font style of your choice in the Design tab, then check out how your actual template look and feel by clicking the Preview PDF. Here's how:
If it doesn't work on your end, I'd recommend using an incognito or a private window as most of the unexpected behavior is caused by a browser-related issue.
For more information, you can check this help article: Delete or disable cache and temporary internet files in your web browser. It will help you learn about deleting all cookies that are specific to Intuit to clear the errors.
Please feel free to message us again if you need help with anything else. We're always delighted to assist. Have a great day ahead.
Thank you but I have used a different browser and it occurs the same way.
I've attached a screenshot. The strongly slanted version is any old invoice template. The Courier version is what happens when I create a new one using EZ keys.
This does not seem to be intended behaviour in QuickBooks. I recommend you contact our Support Team so they can help you investigate this further.
To do this:
Sign in to your QuickBooks Online company.
Select Help (?) at the top right.
Under Need support? select Contact us to connect with a live support agent.
Alternatively you can get in contact with one of our support representatives by phoning 1800 046 038. Our line is open 8:30am - 6:30pm Mon - Fri.