acViewportScale

    acVpScaleToFit = 0

    acVpCustomScale = 1

    acVp1_1 = 2

    acVp1_2 = 3

    acVp1_4 = 4

    acVp1_8 = 5

    acVp1_10 = 6

    acVp1_16 = 7

    acVp1_20 = 8

    acVp1_30 = 9

    acVp1_40 = 10

    acVp1_50 = 11

    acVp1_100 = 12

    acVp2_1 = 13

    acVp4_1 = 14

    acVp8_1 = 15

    acVp10_1 = 16

    acVp100_1 = 17

    acVp1_128in_1ft = 18

    acVp1_64in_1ft = 19

    acVp1_32in_1ft = 20

    acVp1_16in_1ft = 21

    acVp3_32in_1ft = 22

    acVp1_8in_1ft = 23

    acVp3_16in_1ft = 24

    acVp1_4in_1ft = 25

    acVp3_8in_1ft = 26

    acVp1_2in_1ft = 27

    acVp3_4in_1ft = 28

    acVp1in_1ft = 29

    acVp1and1_2in_1ft = 30

    acVp3in_1ft = 31

    acVp6in_1ft = 32

    acVp1ft_1ft = 33