Also stay in the loop with what's going on through these awesome links:
This idea has been merged into another idea. To comment or vote on this idea, please visit MXM-I-392 Add a line item description to invoices, orders, recurring contracts, recurring templates, and display on the modern receipt.
In older incarnates there was a description box after the Product Information where you could put in optional descriptions of the products you were selling. In the current version of MX no such option exists. I was "recommended" to use the Memo box, however the Memo box does not recognize new lines and your descriptions get all jumbled together. I utilized the description box on every invoice or order, please bring it back!