macOS High Sierra - set default Wi-Fi

I wish to set a Wi-Fi access point as default to connect to. I was told to go to Network Preferences and click on Advanced... button to set the default. I am unable to find it. What am I missing?

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Solution 1:

Under Preferred Networks, drag and drop the listed access points in the order of priority you want your Mac to connect to them. Drag the most preferred one to top. Your Mac will connect to it when it is available instead of connecting to other available Wi-Fi networks further down the list.