Thanks for reaching out to us, graatkins.
I understand the need of sending photos and invoices as one pdf file. However, this option is currently not possible in QuickBooks Online.
I recommend looking for a third-party application to integrate into QuickBooks that has this capability. You can go to the Apps menu or use this link to find one: QuickBooks apps.
I've also included this article to learn more about the attachments feature and how it works: Attachments in QuickBooks Online.
For additional reference, check out this resource so you'll learn how to personalise the appearance and layout of your sales forms: Customise invoices, quotes, and sales receipts in QuickBooks Online.
Keep me posted if you have further concerns about sending photos and invoices. I'll be here to help you. Have a good one.
