If you haven’t already, set up your Ledger Nano S following Ledger’s guide here.
On the Applications tab, scroll down to the Stellar app and click the associated green down arrow to add the Stellar Ledger app to your Ledger.
If you receive an error, troubleshoot using this Ledger guide. Confirm on your device, and quit the Ledger Manager on your computer.
Visit the Stellar Account Viewer powered by Stellar.org - a tool for interacting with the Stellar network:
Unlock your Ledger Nano S (if necessary) and open the Stellar Ledger app on the device.
Open Settings in the Stellar app and select “Yes” for Browser Support.
Click the green “Sign in with Ledger” button on the Stellar Account Viewer.
If the button is still grey, make sure that 1) your device is unlocked and 2) the Stellar app is open on your device.
You can now see your balance and public key as well as send lumens to other addresses from this webpage.