org-adapt-indentation

org-adapt-indentation is a variable defined in `org.el'.
Its value is

t

Documentation:
Non-nil means adapt indentation to outline node level.

When this variable is set, Org assumes that you write outlines by
indenting text in each node to align with the headline (after the stars).
The following issues are influenced by this variable:

- When this is set and the *entire* text in an entry is indented, the
indentation is increased by one space in a demotion command, and
decreased by one in a promotion command. If any line in the entry
body starts with text at column 0, indentation is not changed at all.

- Property drawers and planning information is inserted indented when
this variable s set. When nil, they will not be indented.

- TAB indents a line relative to context. The lines below a headline
will be indented when this variable is set.

Note that this is all about true indentation, by adding and removing
space characters. See also `org-indent.el' which does level-dependent
indentation in a virtual way, i.e. at display time in Emacs.

You can customize this variable.