This page shows how its possible to switch Cardano networks for each of the wallet types supported on Clarity
Step 1: Click your profile in the top right
Step 2: Click 'Settings'
Step 3: Click 'Network'
Step 4: Choose network.
Use 'Preview' for testnet, and 'Mainnet' for mainnet.
Step 1: Open Eternl and click the network in the bottom right.
Step 2: Choose network
Use 'Preview Testnet' for testnet, and 'Cardano Mainnet' for mainnet.