To make changes to an order a client has placed, follow these steps:
1. Go to Commerce > Orders
2. Click on the Order (or use the "Search" button to find the correct order)
3. Scroll down to the lab item you wish to change
4. Click "Edit Item"
5. Change the product, the quantity, or the mounting / texture (if available) as needed
6. Click "Save"
When you edit a lab-based item, the words "EDITED ITEM" will appear beside it, letting you know that it has been altered from the original order the client placed.