This is an explanation of the hair sway function added in v0.4.0. We recommend following the guide below while using the video as a reference.
① Select the hair you wish to move (you can select multiple hairs).
② Click on "Create Bone Group" (a bone will be created automatically at the center of the selected tuft).
If the automatically generated bone doesn't create the sway that you were looking for, try creating a bone selecting a specific hair strand as the axis. You can change the axis hair by clicking "Set as Axis" on the right panel.
Also, by selecting an unset strand of hair while selecting a bone group, you can click on "Add Hairs to Bone Group" to add more hair to the group.