When uploading additional files to an existing SprintRay Design Service order, follow these steps:
1. Log in to your SprintRay account
2. Click on the treatment order to open it
3. Click on the paperclip icon to reveal the file upload window
4. Drag and drop your files to the popup window
5. Click the Post button to close the popup window
6. Add a short description to the message box and click the paper airplane icon to submit
7. The files will appear as a new message in the main chat window