Can You Actually Maxamize Program Screens?

hey guys

i'm a recent mac convert and have a question about maximizing windows

i've noticed that when you click the green circle on mac windows that it does not fill the whole screen. i'm used to windows where the square (equivalent of green circle) fills the whole screen except the toolbar with the window.

i did read up on this (or tried to) and saw that the reason is that windows stretches the window to fit the screen but macs keep the same general window size and just stretch it to fill the screen as much as it can while keeping the same dimension ratio or something along those lines

so is there something that can be done to make the green button stretch the window to full screen? or will I have to drag it to full size and back to little size whenever I want to switch between them?

hope this makes sense

thanks!