trilium/src/public/stylesheets/print.css

@media print
{
    html body {
        /* https://github.com/zadam/trilium/issues/3202 */
        color: black;
    }

    .no-print, .no-print *
    {
        display: none !important;
    }

    .relation-map-wrapper {
        height: 100vh !important;
    }
}