diff --git a/index.html b/index.html
index d8af736..feee56b 100644
--- a/index.html
+++ b/index.html
@@ -221,27 +221,33 @@
 	     a.click();
 	 };
 	 inputButtonDownloadPng.onclick = (ev) => {
+             let svgSize = doc.width.baseVal.value;
+             let svgOffset = doc.viewBox.baseVal.x;
              let imgSize = parseInt(prompt("Enter image size (e.g. 2048)", "2048"));
              let svgRoot = doc.getElementById("svgroot");
              if (Number.isNaN(imgSize)) {
                  return;
              }
-             
+             // Resize SVG to output size, then export as XML, and resize back to default size
 	     doc.getElementById("bleed").style.stroke = 'black';
              doc.width.baseVal.value = imgSize;
              doc.height.baseVal.value = imgSize;
              doc.viewBox.baseVal.width = imgSize;
              doc.viewBox.baseVal.height = imgSize;
-             svgRoot.transform.baseVal[0].matrix.a = imgSize/500;
-             svgRoot.transform.baseVal[0].matrix.d = imgSize/500;
+             doc.viewBox.baseVal.x = svgOffset * imgSize/svgSize;
+             doc.viewBox.baseVal.y = svgOffset * imgSize/svgSize;
+             svgRoot.transform.baseVal[0].matrix.a = imgSize/svgSize;
+             svgRoot.transform.baseVal[0].matrix.d = imgSize/svgSize;
 	     let serialized = new XMLSerializer().serializeToString(doc);
 	     doc.getElementById("bleed").style.stroke = '#ff00ff';
              svgRoot.transform.baseVal[0].matrix.a = 1;
              svgRoot.transform.baseVal[0].matrix.d = 1;
-             doc.viewBox.baseVal.width = 500;
-             doc.viewBox.baseVal.height = 500;
-             doc.width.baseVal.value = 500;
-             doc.height.baseVal.value = 500;
+             doc.viewBox.baseVal.width = svgSize;
+             doc.viewBox.baseVal.height = svgSize;
+             doc.viewBox.baseVal.x = svgOffset;
+             doc.viewBox.baseVal.y = svgOffset;
+             doc.width.baseVal.value = svgSize;
+             doc.height.baseVal.value = svgSize;
              
              let canvas = document.createElement('canvas');
              canvas.width = imgSize;