2. "Preheader" will update the text for your campaigns header
3. The "View in Browser" will add a link that will open campaign in browser
4. Logo - Update Logo, add Logo as Text, or remove Logo completely from Campaign. Align the Logo, add a Link to the Logo, and change spacing for the Logo
5. Colors and Fonts will allow you to customize colors or use auto-branding colors that were set under your account settings for the following items :
Heading 1
Heading 2
Heading 3
Normal Text
Header and Footer Text
Button Color
Button Text
Link Color
Canvas Background
Email Background