How to save function as f.m?

This may sound simple but I am still new to this. I don't know to save thr below funtion as f.m?? Right now it is an mlx??

function dYdt=f(t,Y)

y=Y(1); v=Y(2);
dYdt = [v; -7*sin(t)-4*v-5*y];

Answer 1

[Voss]

Are you able to click "Save As..." and then, in the Save dialog window that pops up, change the "Files of Type:" from .mlx to .m?