Step 6: Draw two more lines with circles on the ends under the body as guides for the orangutan's legs. The lines should be smaller, and they should angle a bit to indicate where the knee joints will be.
That's it for the initial sketch! From this point on, press harder with your pencil to get a more defined sketch.
Step 7: Draw the eyes inside the orangutan's head using the lines as guides for placement. The shape of the eyes is similar to tiny footballs. Draw a circle inside each eye for the eye's irises. Inside each iris, add a small dot for the pupils. Shade in the irises using a value that's lighter than the pupil. Shade in the rest of the eyes too using a slightly darker value. Add a few lines around the eyes for the wrinkly skin.
Step 8: Draw the thick brow above the eyes using a series of lines. A curved line directly above each eye makes the eye sink deeper into the face. Add a few lines higher above the orangutan's eyes for the top part of the brow ridge.
Step 9: Draw the orangutan's nose under the eyes and inside the small initial circle. The nose basically consists of two small slits for the nostrils placed to the left of the construction line. Draw a few curved lines around the nostrils for the nose's structure.