As a company, you can require drawing attachments from customers on the process of ordering. If you think there will be situations when drawing attachments is not mandatory to upload, you can make them optional. As a default state, we don't even show that option until you want to enable it.

So let's see how it works

Firstly we need to enable this function on specific printers, so whenever the user selects exactly that material "Technical drawings" field comes up. You can do that here:

NB: When "Drawings are required" is selected, the order can't be finalized unless some kind of additional file is added to the original 3D model.
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Customers can upload up to 20 files within jpeg, png, or pdf format simply by clicking on the "Choose file" button and selecting items.

After uploading all items and clicking on confirm button, customer will see info about the attached files on the left side

And when the order is confirmed and the customer is on the next page he/she still can delete or add more attachments.

After final confirming drawing materials will be visible for the company. To see it go to the orders page open that order and find attachments under the model's label.