Pre-orders for print books:
Any title with a future on-sale date or publication date in Ingram metadata will be a pre-order through Aerio.
If you are providing on on-sale date, it is important that this reflects the date your title will be available to ship to consumers.
Spark publishers and authors may reference this great article on listing titles as available for pre-order.
Pre-orders for ebooks:
Choose a future "On Sale Date" during ebook upload. Instructions on the ebook upload process are here: How to Upload Your eBook and Create a Preview.
If you ebook has already been uploaded and you need to change the "Publication Date," go to the title's "Book Dashboard" under "My Inventory" and then choose "Retail Settings."