.

cards/views.py

@@ -439,23 +439,38 @@ def print_preview(request):
     except Exception:
         design = 1
     scale = float(data.get('scale', '1')) if data.get('scale') else 1.0
+    try:
+        per_page = int(data.get('per_page', '2'))
+    except Exception:
+        per_page = 2
+    if per_page not in (1, 2, 4):
+        per_page = 2
     # Fetch cards preserving the given order
     cards = list(Dinosaur.objects.filter(pk__in=pks))
     # Reorder according to provided pks
     pk_to_card = {str(c.pk): c for c in cards}
     ordered = [pk_to_card[pk] for pk in pks if pk in pk_to_card]
 
-    # Build pages: two cards per A4 page (2-up)
+    # Build pages: per_page cards per A4 page
     pages = []
-    per_page = 2
     for i in range(0, len(ordered), per_page):
         pages.append(ordered[i:i+per_page])
 
+    # Determine grid columns for layout: use 1 column for 1-up, 2 columns for 2/4-up
+    columns = 1 if per_page == 1 else 2
+
     # Include the active background (if any) so fragments that fall back to
     # a global `background` variable can render correctly in the printable view.
     background = BackgroundImage.get_active() if BackgroundImage.objects.exists() else None
 
-    return render(request, 'cards/printable.html', {'pages': pages, 'design': design, 'scale': scale, 'background': background})
+    return render(request, 'cards/printable.html', {
+        'pages': pages,
+        'design': design,
+        'scale': scale,
+        'background': background,
+        'per_page': per_page,
+        'columns': columns,
+    })
 
 
 def _parse_pasted_input(text):