Blending Colors and Shapes - Adobe Illustrator CC - page 456

intermediate steps are visible in the blend. You can also specify the distance between
intermediate steps in the blend.
9 . You can use the Direct Selection tool ( ) to select and adjust the shape of an original
object, thus changing the shape of the blend. You can change the colors of the original
objects to adjust the intermediate colors in the blend. You can also use the Convert
Anchor Point tool ( ) to change the shape of the path, or spine , of the blend by
dragging anchor points or direction handles on the spine.