Hi, none-ya-biz.
I know how important it is to have landscape and portrait options when printing invoices in QuickBooks Online. While this option is currently unavailable, I'll take note of this and add it to our list of ideas.
For the time being, you can visit our blog. This way, you’ll be updated about what new changes and features, and hopefully this feature would be one of them.
You might want to visit the following article. It contains more information about printing sales forms as well as steps on how to print them by batch: Email or print multiple invoices and sales forms.
Let me know if you have any other questions about this or anything QuickBooks related. The Community has your back and I'm here if you need further assistance. Have a great rest of your day!
