Use the familiar Tab and Shift+Tab keyboard shortcuts to use indent / outdent to create or modify content structure. This keeps the learning curve for teh new Editor short, and maintains the same UX without increasing user effort to perform routine authoring tasks.
Keyboard shortcuts
The keyboard shortcuts Tab
(indent) and Shift+Tab
(outdent) are only supported on list text. This includes <ul>, <ol>, and <li> elements.
Indent and outdent on other text or content elements is supported through menu and toolbar buttons.
Menu: Format > Indentation > Increase indent or Decrease indent
Toolbar: Indentation button > Increase indent or Decrease indent
The decrease indent option does not appear for content that has not already been indented.
Disable or enable keyboard navigation
The Keyboard navigation option is returned in the Tools menu dropdown, and is enabled by default.

The option selection is stored and the last state carries over from one edit to another.
Enable keyboard navigation
When selected and enabled, keyboard navigation within the Editor text area is enabled. This means Tab and Shift+Tab are used to navigate within the editor text area.
When Keyboard navigation in Tools is selected and enabled, a timed info notification is returned with "Tab and shift+tab to navigate are enabled." This notification closes automatically after 5 seconds.

Disable keyboard navigation
When deselected, keyboard navigation within the editor text area is disabled. This makes Tab
the keyboard shortcut for indent, and Shift+Tab
the shortcut for outdent on all text/content elements.
When Keyboard navigation in Tools is deselected and disabled, a timed info notification is returned with "Tab to indent and shift+tab to outdent are enabled." This notification closes automatically after 5 seconds.
