The polygon slice function of TexturePacker Pro is very nice, it suit the size of the sprite. However my TexturePacker Pro trial had finished, and by using Unity Sprite Editor will make my sliced sprite tremble, I don't know why.
How can I use Unity Sprite Editor to slice my sprites correctly?
If you are seeing trembling in your sprite animations the problem is the pivot point on the sprite sheet. In Unity, the pivot point looks like a blue circle on each sliced sprite in the editor (see screenshot). The pivot point acts as the point of rotation and also the starting point for where the sprite will be rendered in the scene. To fix the problem click the pivot point and on each sliced sprite and drag it to a position that you know will stay constant, like an eyeball or a foot.
