I’m very satisfied with SubTotal — it’s a great tool. That said, I’ve seen in the forum that many users would appreciate more control over the visual layout of their invoices.
It would be fantastic if SubTotal allowed a bit more formatting flexibility, such as supporting basic HTML tags. For example, the ability to bold text using <b>Text</b> would already make a significant difference.
There are a few other basic tags that could be useful as well. Ideally, these should be allowed in all text fields, invoice types, addresses, company information, and so on.