Step 21: Use the line on the left as a guide to draw the tail. The tip of the Great Dane's tail should come to a point.
Step 22: For a cleaner look, erase as much as you can of the initial guide lines. Don't worry about erasing all of the guides. It's okay to leave some behind. Re-draw any final sketch lines you may have accidentally erased.
Final Step: Add some shading to your Great Dane drawing to give it more dimension and volume. Pick the direction of the light source when shading so that the shadows are consistent with it. Vary the pressure on your pencil to get different degrees of tonal value.
Add a cast shadow underneath. This helps ground the dog so it doesn't appear to be floating.
You can add even more value throughout your drawing for extra detail. Great Danes have different types of coats (some have spots or stripes!), so you can shade yours however you'd like. If you have a pet Great Dane or a similar breed, try to duplicate its coat on your drawing. For a simple coat, simply use a medium value all over the body.
You can also make the shadows darker to emphasize the structure. Continue shading until the dog's entire body is covered in a medium value. Shading can be time-consuming, so be patient and take breaks. Remember to pause the video to draw at your own pace.