The Title Bar on iPad provides powerful navigation, formatting and sharing options.
Click on any link below to go to the relevant support article.
Buttons left-to-right:
Navigation keys Move backward or forward thru your navigation history. Long-press on < or > to display full history.
Editor Options Quick access to toggle Focus Mode, Syntax Highlight, Stats, as well as Editor settings.
File Options iPadOS dialog for renaming, moving and other file options.
Preview Toggle Preview pane to see your formatted document.
Share Access iOS share sheet, export, print and publishing options.
New File Create a new blank document in the current Location.
Title Bar 
Titlebar Mac The title bar on Mac provides quick access to document history navigation, toggling Focus modes and Preview panes Buttons Click on any link below to go to the relevant support article. Buttons left-to-right: Show-Hide Library Navigation keys Move backward or forward thru your navigation history. Long-press on < or > to display full
The Title Bar on iPad provides powerful navigation, formatting and sharing options. Buttons Click on any link below to go to the relevant support article. Buttons left-to-right: Show-Hide Library Navigation keys Move backward or forward thru your navigation history. Long-press on < or > to display full history. Editor Options Quick access to toggle Focus