Orlando theme is providing highest options to customize Checkout page.
Go to Online Store -> Customize -> Theme Settings -> Checkout
* You can Set the Banner Image.
* Change the logo image, logo position as well as logo size.
* Set the background image of Main Inner Body else set the background color.
* Set the background image of Order Summery panel.
* Set the Font of Headings & body text.
* Set the color of Links, highlights, check-marks, Buttons & Errors Messages.
Still, you need more customization settings visit the Admin Panel else mail us at firstname.lastname@example.org