Click on any female character and this Details window will appear:
1 - Morphs tab. Drag sliders below to change breasts size, add elf ears and so on.
More info:
2 - Textures tab. Provide your own Diffuse/Roughness/Normals/Specular texture maps to change look of a model.
More info:
3 - Change object position/rotation in a scene.
4 - Resets all morphs to their default values.
5 - Select morphs category and its morphs will be displayed in a list below.
6 - Extend morph range. Usually morphs allow you to change model's shape slightly, but when you click on "E" button range will be extended +100%
7 - Reset morph. Sets morph back to its original value.