if (EQ (prop, Qright_margin)) return 1440;
if (EQ (prop, Qtop_margin)) return 720;
if (EQ (prop, Qbottom_margin)) return 720;
if (EQ (prop, Qright_margin)) return 1440;
if (EQ (prop, Qtop_margin)) return 720;
if (EQ (prop, Qbottom_margin)) return 720;