I currently have some money in my Amazon account purchased through an Amazon gift card and can redeem an additional card through the web interface. I have redeemed cards directly on the kindle, but that was when prompted because the balance was too low for a purchase.
Where or how can I redeem a gift directly on the Kindle itself? I've looked through the online store interface and been through the settings. It's a seventh generation kindle with touchscreen, but not a paperwhite -- it uses e-ink.
I can just redeem through the web interface, but would like to be able to use the Kindle itself.