This example shows character feet pinned to their positions
Some elements of the character rig can be fixed (or, pinned) at their positions. A fixed object would not change its position when you work with object connected to it, allowing for more precise control over character pose.
Fixed objects can be moved, rotated or scaled by applying Manipulators to them.
The following types of objects can be fixed:
Fixing a box controller will fix every point controller that is associated with it.
To fix a controller, select it and press R.
To remove fixing, select a fixed controller and press R.
Fixed controllers are colored red in the Viewport.