Invoice may seem the less needed thing to design, however it fulfils the customers' experience and show them how do you care about them. Make your invoices pop!
All invoices are made with auto layout, so you may easily change spacings. All parts are made as components, so you don't need to click on every item to change it, just select the certain component. Also, you may change the font and colours (if 5 are not enough!) with ease!