Which editor can I use to create a nested hierarchy?

Question

I'm using OpenOffice (don't have Microsoft Office). I'm designing an application and I want to create a hierarchy similar to what the image below shows.

There can be several nested levels of hierarchy and I should be able to create another by simply pressing Tab or undoing it by Shift-Tab.

Which tool/editor can I use for it?

Answer 1

You can choose styles in Menu -> Format -> Bullets and Numbering

I'm using LibreOffice, should be same as OpenOffice.

and HERE is the help document.