Where to Start with Inverse Kinematics?
IK works best when you lock a part of the character on the spot, such as a foot on the floor, then select the entire body or another extremity and move it. It also works well in single chain mode when you need to simply position a limb.
Tip: To lock a part in place, use the IK Nail option—see Nails.
How to use the Inverse Kinematics tool
| 1. | In the Tools toolbar, select the Inverse Kinematics  tool or press Shift + I. |
| 2. | In the Camera view, Ctrl + click (Windows/Linux) or ⌘ + click (Mac OS X) on a part of the body. |
The entire IK skeleton appears.
| 3. | Click on a part of the body and pull on it to move the character. |
| 4. | Hold down the Shift key and click on the pivot belonging to the part you want to lock in place.You can Shift + click on a bone to lock the orientation of the bone. |
| 5. | Click on another part of the character and pull on it. |