if it's always consistent then set it directly
PANEL* panDisplay= {
digits(100, 300, "# 1: %0.1f", "Arial#60b", 1, t_1);
digits(450, 300, "# 2: %0.1f", "Arial#60b", 1, t_2);
red = 255; green = 0; blue = 0;
flags= VISIBLE;
}