Kept on this device. The reader has the same choices under More → Reading settings.
IconsNavy
The tab icon changes at once. A home-screen icon is fixed when the Atlas is added: choose first, then install. If it is already on your Home Screen, remove it and add it again.
Your datathis device only
Highlights, notes, Shared verses, reading progress and settings are kept in this browser only. Nothing is sent anywhere.