Large Time Signature

Hello! I am writing scores for marching band and I generally have large scores. When printing the score, the default time signature is quite difficult to see and can be easily missed when being read through. is there any way to add a larger time signature? (example attached below). I am not sure if there is any way to do it by fiddling around with the settings but if so, I myself have not been able to figure it out. and if this is a possible feature, is there any way to change the font of JUST the time signature without changing the entire score?