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, Your name, Signature, Edit signature, Notifications, Notification sound, Vibrate, Auto-sync email, Sync schedule, Email sync period, Message size limit, and Advanced settings.