Hi there, @FiveG and @Olivier T.

I acknowledge your feedback and suggestions about managing invoices as a PDF. Please know that our product engineers are working continuously to improve the product's features. 

While this feature isn't available, I suggest submitting feedback directly to our product engineers. They may look into this suggestion further and consider adding the option in QuickBooks Online (QBO). To submit feedback, you can go to the Gear icon and select Feedback. Then, enter your suggestion and click Submit Feedback.

You can also visit our Customer Feedback page. This will help you track the status of your product request and get the latest updates from our developers. Updates such as how the recent enhancement made to QBO helps our business owners, like you.

Please touch base with me here for all of your QuickBooks needs. I'm always happy to help.