#define SU_PUNCHVEC1 (1<<16)
#define SU_PUNCHVEC2 (1<<17)
#define SU_PUNCHVEC3 (1<<18)
-#define SU_UNUSED19 (1<<19)
+#define SU_VIEWZOOM (1<<19) // byte factor (0 = 0.0 (not valid), 255 = 1.0)
#define SU_UNUSED20 (1<<20)
#define SU_UNUSED21 (1<<21)
#define SU_UNUSED22 (1<<22)