New tabs by view
Option(⌥)-click a toolbar button to create a new tab in that mode. (more…)
Option(⌥)-click a toolbar button to create a new tab in that mode. (more…)
Use Command 1-6 (⌘+1) to quickly switch between view modes. (⌘+2 and ⌘+3 to go between Edit and Preview are particularly useful.)