Not a great workaround, but you can control layout and display with CSS injection if you use the web app. This is my stylus (chrome extension) setup:
@-moz-document url-prefix("https://app.tana.inc/") {
.mediaitem.large.pdfViewer {
height: 90vh !important;
}
}
+1
At least expose this solution better to search/crawl/AI/docs