text: If the address you want to send to is on someone's cell phone, you might not want to type in the full address. Chances are, though, that they'll also be able to show you the QR code for their account. You can scan a QR code with TREZOR Wallet simply by pressing the scan QR code button in the address field and holding a picture of the QR code up to your computer's webcam.
  It's also simple to send the maximum possible amount from the current account. Just press the "arrow" button in the BTC field (see image below)
  In case you have enabled Labeling you will also see "Comment" row, where you can write a comment for the current transaction. Please find more information about how the Labeling works in the link above.
  Once you have pressed send and entered your PIN, you will be asked to confirm your transaction. Check the amount of the transaction and the destination address. If the amount and address are correct, press the right button on your TREZOR to confirm. If they are wrong, press 'cancel'. If they are wrong, it may mean that your computer has been infected with a virus and you can be happy that your bitcoins are safe in your TREZOR, and not already stolen.
  Each time you send bitcoins you have to pay a small transaction fee. This fee will be automatically calculated for you by the TREZOR Wallet and charged against your account. This fee goes to funding the running of the bitcoin network and is not charged by SatoshiLabs.