If you want to create a custom indented list style, choose Edit > Bullet, Numbering, and Outline Styles, then choose Outline Style from the New button in the resulting dialog box.
The Edit Outline Style dialog box displays, giving access to nine levels for each outline style. You’ll see that each level of the outline style has an indent value, which can be changed. Each indent is applied cumulatively and all outline style indents are applied on top of paragraph indents. There’s also the choice of Bullet or Numbering style (or None) and a number separator setting for each level.