.collectionPdfView-buttonTray {
    top : 15px;
    left : 20px;
    position: relative; 
    transform-origin: left top;
    position: absolute;
}
.collectionPdfView-thumb {
    width:25px;
    height:25px;
    transform-origin: left top;
    position: absolute;
    background: darkgray;
}
.collectionPdfView-slider {
    width:25px;
    height:25px;
    transform-origin: left top;
    position: absolute;
    background: lightgray;
}
.collectionPdfView-cont{
    width: 100%;
    height: 100%;
    position: absolute; 
    top: 0;
    left:0;
}
.collectionPdfView-cont-dragging {
    span {
        user-select: none;
    }
}
.collectionPdfView-backward {
    color : white;
    font-size: 24px;
    top :0px;
    left : 0px;
    position: absolute;
    background-color: rgba(50, 50, 50, 0.2);
}
.collectionPdfView-forward {
    color : white;
    font-size: 24px;
    top :0px;
    left : 45px;
    position: absolute;
    background-color: rgba(50, 50, 50, 0.2);
}