.imgClass {
    background-image: url('./graphics/back_button.jpg');
    background-position: 0px 0px;
    background-repeat: no-repeat;
    width: 47px;
    height: 45px;
    border: none;
    background-color: none;
    cursor: pointer;
    outline: 0;
    position: fixed;
    right: 1.7%;
    top: 11%;
}