Add Mesh
Before you can create any deformations, you’ll need to add a mesh. With the image selected, either hit the Create Mesh button in the Inspector, or hit the Enter key. You’ll notice that a simple mesh is automatically generated for you.

Edit Mesh
You can edit a mesh at anytime by using the Edit Mesh button in the Inspector or hitting enter with the asset selected. Use the Pen tool to add, subtract, or move vertices.
Vertex Deform
In both Design and Edit modes, you can deform your mesh by entering edit mesh mode, and moving a vertex with the select tool.
Binding Bones
Another way to deform your mesh is by connecting bones to it, a process called binding. This will allow you to deform specific parts of your image with one bone while other parts of the same image are controlled by other bones.
Edit Weights
Once bones have been connected to your mesh, you need to tell them how they should affect each vertex. This is done in Edit Mesh mode by selecting vertices and adjusting their weights in the Inspector. Alternatively, you can adjust your weights by utilizing the Weight tool. With Edit Mesh mode active, hit the W key to active the Weight tool. Notice that when the tool is active, the weight of each vertex is displayed.