The Signer Selector allows you to select which wallet you want to interact with the blockchain with via the MultiBaas web UI. It is divided into three sections: connected web3 wallets (e.g. MetaMask), Cloud Wallets, and multisig wallets. You can copy addresses and label web3 wallets. Labels are local to your MultiBaas user.
If the browser or web3 wallet is connected to a blockchain network different from the MultiBaas deployment, a button will appear to switch the browser or web3 wallet to the MultiBaas' deployment web3 network.