How to create a ledger for Electrum Wallet-Master Public Key (xPub)
The Master Public Key key allows NODE40 Balance do determine which public keys belong to your wallet.
How to export your Master Public Key
Open your Electrum wallet and select the menu item Wallet => Information.
Create a NODE40 Balance Ledger
Select Digital Currency
Select Wallet Type: xpub
Copy the Master Public key and paste it into the upload dialogue at NODE40 Balance.