igi_output, f, a, "", , ,	Output igi script file name
vleft, r, a, , , ,		left location of the gray scale bar
vright, r, a, , , ,		right location of the gray scale bar
vbottom, r, a, , , ,		bottom location of the gray scale bar
vtop, r, a, , , ,		top location of the gray scale bar
min, r, a, , , ,		minimum brightness of the gray scale bar
max, r, a, , , ,		maximum brightness of the gray scale bar
label_size, r, a, , , ,		label size of the gray scale bar
negative, b, a, , , ,		Is this a negative image?

mode, s, h, "al"