Download the Blueprint Definitions JSON file
Navigate to the Blueprint Definitions page and click the "Download Blueprints" icon near the top of the screen. This will save the blueprint-defintions.json file to your local hard drive, typically the Downloads folder.
Before making changes to this file, we recommend making a copy of the version you downloaded and setting that aside, just in case you need to revert back to the previous configuration.
Edit the file
Open blueprint-defintions.json in a text editor of your choice to view and edit. For example, on a Mac you can use TextEdit; and on Windows machines, Notepad.
Save and close the file.
Upload a new version of the file
Back on the Blueprints Definition page, you may now upload your JSON file via by clicking on the "Upload Blueprints" icon near the top-right corner of the page.
A modal window will appear with a message about how the existing JSON file will be overwritten by your new one. Tick the checkbox and click OK to proceed.