I also requested this feature years ago and it still isn't an option. I have to use a CRM that (kind of) integrates with Quickbooks Online just so I can send my customers an estimate or invoice with photos. This is a really basic thing to have on these documents. An attachment does not cut it. Customers want to be able to easily reference the product information, and know exactly what they are looking at without having to check another database of some kind, and I can't have my employees spend hours to attach dozens of photos to each of the hundreds of invoices we send. Both estimates and invoices need a thumbnail photo to the left of the product information that can be clicked to enlarge when viewed online.
