In the Standard Scatter submodule, we can add a pattern of points to generate our fractures. By default, we will have a single density, we can choose from where we want the points to be generated, Volume, Faces, Vertices, etc.
If we have used the Paint tool in the Paint Tools section, we will have new options in the Standard Scatter module. Now we will have 2 densities, one for the area we have painted, and another one for the general density. This is very useful to add more fractures in localized areas.
If we have used the Annotate tool, we will have the normal density options, and thus be able to choose a "base" density of fractures, having then more details of fractures in the zones with "Annotate".
Result with a fractured Standard Scatter
Result using the Paint tool
Result using the Annotate tool