Core extension allows users to sign transactions on a network that is different from the network currently selected (i.e. signing a tx on the Dexalot L1 when the Avalanche C-Chain is the active network).
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This allows users to make swaps across chains and L1s without having to switch active networks within the Core extension. Users will see the notice below to show which chain the transaction is on.

For any additional questions, please view our other knowledge base articles or contact a support team member via the chat button. Examples are for illustrative purposes only.