This feature is available.

You can now preview invoices and receipts.

Hi everyone! Appreciate your suggestions here. We are working on implementing a proper preview feature very soon, in the meantime we created a Help article showcasing exactly how your clients' experience on Maroo will look like.

Please find it here: https://help.maroo.us/en/articles/8123812-how-does-it-look-like-for-my-clients