input[type="range"] {
    margin-top: 10px;
    margin-right: 30px;
    width: 80px;
}
#_1dRange {
    width: 300px;
}

.btn-group, .top8px {
    margin-top: 8px;
}

#optsArea, #helpArea {
    display: none;
    width: 100%;
    height: 180px;
    /*margin-bottom: 4px;*/
}

#helpArea {
    background-color: whitesmoke;
    position: absolute;
    z-index: 1;
}



#canvas2d {
    background-color: cyan;
}