viewer.css
.PDFFileView {
height:11.5in;
margin:1.0rem;
max-width:95%;
max-height:100vh;
border: 4px solid black;
overflow-y:scroll;
}
.PDFFileView canvas {
border-bottom:2px solid black;
max-width:100%;
max-height:100%;
}
.PDFFileView h4 {
padding:0;
margin:0;
}