You can use the mesh tool to select, add, and delete mesh points to change the way colors blend in a mesh object. Every mesh point has a set of direction handles that let you adjust the distance and direction that a color blends with neighboring colors in the mesh object.
First, you'll use the mesh tool to select a mesh point and add a color to the butterfly's forewing.
Select the mesh tool () in the toolbox and position the pointer over a mesh point. The plus sign on the pointer disappears when it's over a mesh point. Click to select the mesh point. (We selected the lower right mesh point where the right vertical line intersects ...