How to add indent and outdent options to the HTML editor in Knowledge.
1) Open System Properties -> UI Properties
2) Near the bottom find the option that reads "(TinyMCE v.4.0.26) Configures the editing toolbar (first line) for HTML fields"
3) Add the text "indent,outdent," to the text box there just after "numlist," or anywhere else you would like to see the buttons
4) Hit Save