Fullness Types
Dart manipulation moves the fabric a pattern already has. Adding fullness is different: it makes the pattern piece bigger, so you get volume, drape, flare or gathers.
Peplums, Flounces, Godet
Peplums, flounces and godets add flare to one part of a garment while the rest stays fitted. Most of them start with the slash and spread you met in Fullness Types.
Pleats, Pin Tucks, Flanges
How pleats, pin tucks and flanges control fullness, and how to draft each one from a basic pattern.