You can navigate between emails within an email (going to the next or previous one) by a few simple ways:

  1. Swipe within an email – You can navigate between emails by simply swiping left and right while inside an email
  2. Volume keys of your device – Configure with More (o o o) | Global Settings | Advanced Features | Volume Key Scrolling.

Note: Pull down action will return you to the Inbox, so that you can use TypeApp in a single hand more conveniently