To split and extrude a face for the thumb
1. Select LeftHand.
Make sure it is highlighted in green in the scene view. If it is not green, select LeftHand in the
Outliner.
2. Use Edit Polygons > Split Polygon Tool to split the side face in the thumb region into three faces.
While splitting, make sure the middle face is larger than the outer faces as shown below.

3. Extrude the middle face and drag it directly outward.
4. Click the surrounding blue circle and use the rotate manipulator to aim it in a direction appropriate
for a thumb.

5. Extrude three times more to create each segment of the thumb. Use the extrusion manipulator to
rotate, move, and scale each extrusion to create the desired shape of a thumb. Use the following
figure as a guideline. Again, it's unnecessary to match the illustration or create a realistic thumb
for this lesson.

The extrusion manipulator is easy to figure out by clicking and dragging its various elements. If
necessary, you can also use the conventional Move, Scale, and Rotate Tools to reshape the faces
that control the thumb's shape.

6. In the scene view, right-click LeftHand and select Vertex from the marking menu. The purple
vertices at the corners of the faces control the adjacent region of the hand.

7. Make coarse adjustments to various parts of the hand by repositioning the vertices with the
Move, Scale, and Rotate Tools.

The Move Tool works on individual vertices or groups of vertices. Rotate and Scale works on two
or more vertices. Undo any changes you don't like using Ctrl-Z (Windows and Linux) or Control-z
(Mac OS X).

Try to create the approximate thickness, length, and curvature of a cartoon character's hand and
fingers. There's no need for perfection. You'll refine the fingers later. An example hand follows.
(You might be satisfied with a simpler shape.)