How do I set my shopping cart to offer both ShipStation rates and the regular shipping options I put into the Rain system?

After logging into the Rain system, on the far right side of the blue bar click on the gear-shaped button and go to Settings > Website Settings > Shipping. Near the top of the list of options, click the Configure button for Enable Shipping Station Integration and scroll down below the methods and packaging. You will see an option to set how you want your ShipStation methods to work in the shopping cart. There are three options: 1) Show both ShipStation and system-configured rates, 2) Show system-configured rates if available, then ShipStation rates as a backup, or 3) Never show ShipStation rates. Select your choice, then be sure to scroll to the bottom of the panel and click Save.