Use a Guide modifier to generate hair guides that shape and deform the hairs. The guides can be sculpted using the interactive grooming tools, generated from existing curves, or converted to dynamic curves.
This workflow provides a quick way to generate base hair style quickly or for transferring a groom or shape from existing curves. If needed, you can use the interactive groom tools or modifiers to finalize the hair style.
If you add a Guide modifier after you have started grooming your hair, the shape of sculpted hairs may be affected when the guides are created.
See Create hair and fur using interactive grooming and Work with interactive groom modifiers.
You can also use the sculpted guides to control hairs in multiple descriptions. See Control multiple descriptions using a Guide modifier.