.canvas-holder{
    overflow: hidden; 
}

canvas{
    -webkit-box-sizing: content-box;
    -moz-box-sizing: content-box;
    box-sizing: content-box;
}

.subtle-watermark {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 9;
    height: 31px;
    width: 90px;
    opacity: 0.8;
    pointer-events: none;
}