This pattern gives you the number of rounds available for decreases at the thumb tip and fingercaps, but to get the number of stitches to decrease and the number of stitches to leave before fastening off, you must adjust according to the type of stitch you are working. See Calculating Decreases at Mitten Tip on page 141 for advice.
The fields F, G, and H are optional. You need to fill these in only if you are working a stitch pattern with known row/round and stitch repeats per unit of measurement.
Fields marked with * are required.