A poster printed from a phone is exactly one page (its print root is sized and clipped to the fitted sheet), and its leader lines match the image print's weight

library/components/poster/PosterWall.vue

@@ -867,8 +867,13 @@ function fitForPrint(html) {
   const M = (PRINT_MARGIN_MM / 25.4) * 96
   const W = +box[1], H = +box[2]
   const f = Math.min((pageW - 2 * M) / W, (pageH - 2 * M) / H) * 0.995
+  const w = Math.floor(W * f), h = Math.floor(H * f)
+  // On a PHONE the sheet prints inside the page itself (printInPlace's #dxm-print-root), where the host's print rules
+  // force html/body overflow visible, so the stage's unscaled layout box spilled onto blank pages: the root is sized
+  // and clipped to the fitted box too (the frame print has no root, so this rule changes nothing there).
   const css = `<style>@media print{@page{margin:${PRINT_MARGIN_MM}mm}.stage{transform:scale(${(+sc[1] * f).toFixed(6)})}`
-    + `html,body{width:${Math.floor(W * f)}px;height:${Math.floor(H * f)}px}.lead{stroke-opacity:.55}.slead{opacity:.35}}</style>`
+    + `html,body{width:${w}px;height:${h}px}#dxm-print-root{width:${w}px!important;height:${h}px!important;overflow:hidden!important;margin:0!important}`
+    + `.lead{stroke-opacity:.75}.slead{opacity:.5}}</style>`
   return html.replace('</head>', css + '</head>')
 }