To change the Email settings, open the Email app, tap the Menu icon > Settings.
The General settings menu includes the following options: Email preview, Conversation view, Split view, Set default account, VIP settings, Save to, Ask before deleting, Auto-advance, and Load images.
Tap an account in the list to modify the settings that apply only to that account including Account name, Signature, Edit signature, Notifications, Notification sound, Vibrate, Auto-sync email, Sync schedule, Folders to sync, Email sync period, Message size limit, and Advanced settings.