How to switch/add mainnet in MetaMask - 图1
MetaMask is a free and secure browser extension that allows web applications to read and interact with the Ethereum blockchain.

How to switch mainnet

  1. Open MetaMask on your browser and click on the “Ethereum Mainnet” on the top bar to open the menu.
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    2. Click the mainnet to switch (such as Kovan Test Network) to directly change the mainnet connected to the current wallet.
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How to add mainnet

  1. Open MetaMask on the browser, click on the top bar to open the menu and select “Custom RPC”.
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    2. Enter the main network information to be added in the pop-up page.
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  2. After clicking the “Save” button, there will be the added mainnet to choose from in the menu at the top bar.