In one sentence, describe what the following article is about:

You should have a measurement for the shoulder to wrist and shoulder to elbow lengths. Mark the shoulder point with an A and the wrist (end of the sleeve) with a B. Place these marks in the center of the paper. If needed, you can crease the paper down the middle and then unfold it to help you find the center of the paper. Measure from the folded edge parallel to point A to the end of the measurement for your armhole depth. Place a mark to indicate the measurement and label this as point C.  For example, if your armhole depth measurement is 10 inches (25 cm), then you would measure 10 inches (25 cm) down from point A. Use your armhole depth measurement to find the point where your bicep circumference measurement should be. Measure from point C to half the bicep circumference you have recorded (including the amount that you added for slack) on either side of the line. Make sure that these points are even with each other. Connect the points to form a line that intersects point C at a 90 degree angle. For example, if your bicep circumference measurement was 20 inches (51 cm) and you added 2 inches (5.1 cm), then you would need to divide 22 inches (56 cm) by 2 to find half of your bicep circumference. In this case, half the measurement would be 11 inches (28 cm) and you would place marks 11 inches (28 cm) from either side point C. Next, use the same process to identify the wrist circumference. Draw 2 points parallel to point B to indicate half of the wrist circumference. The full length of this line will be the total wrist circumference. For example, if your wrist circumference measurement was 7 inches (18 cm) and you added 1 inch (2.5 cm), then you would need to divide 8 inches (20 cm) by 2 to find half of your wrist circumference. In this case, half the measurement would be 4 inches (10 cm) and you would place marks 4 inches (10 cm) from either side point B. Draw a line extending from the end points of the lines you just made through points C and B. These will be the outer edges of your sleeve pattern.

Summary:
Mark the pattern paper with the length measurements. Mark your armhole depth. Draw a line through the armhole depth to mark your bicep circumference. Draw a line from the wrist mark equal to half your wrist circumference. Connect the ends of your lines.