The provided image depicts what is commonly referred to in typography as a fleuron (Wikipedia) or stylised break in the text, represented by a single glyph or arrangement of glyphs. Feurons are often use to indicate sub-chapter / section breaks in content. Because they are simply text elements (drawn from a font) they can be created just like any other piece of text i.e., by creating styles that include the required Indents & Spacing, Alignment, Text flow, and Tabs values. The example shows:
- A blank line before the first line of three asterisks.
- Both lines with asterisks are centred.
- The first line probably just uses spaces to separate the asterisks.
- A blank line after the second line with a single asterisk.