Add scroll to noscale

1

Hello, how do you add scroll to a noscale site?

body {
    height: 100%;
    width: 100%;
    overflow:hidden;
    margin-left: 0px;
    margin-top: 0px;
    margin-right: 0px;
    margin-bottom: 0px;
    background-color:#FFFFFF;

i changed the overflow to "scroll but that it doesn’t scroll far enough.