Tip: You can disable the ability for customers to attach files when submitting a print order.  This is often a consideration for compliance reasons.  Here is how to do this:

How to Disable File Attachment Uploads – KB Article 40216

  1. Go to Website > Finished Sizes.
  2. Select the Finished Size to modify.
  3. Enter CTRL F “Maximum Number of File Uploads Per Order
  4. Set this value to 0
  5. Select Update