diff --git a/e2e/shot.mjs b/e2e/shot.mjs
new file mode 100644
index 0000000..fb19e01
--- /dev/null
+++ b/e2e/shot.mjs
@@ -0,0 +1,22 @@
+/* Throwaway: one wide screenshot of the writing surface, to look at it. */
+import { OUT, launch, withFreshUser, createNotebook, createNote, typeInEditor } from "./lib.mjs";
+
+const browser = await launch();
+const session = await withFreshUser(browser, "shot");
+const p = session.page;
+await p.setViewportSize({ width: 1680, height: 900 });
+await createNotebook(p, "Look");
+await createNote(p);
+await typeInEditor(p, "askjdnasjkdnkjasndjknkjaskjdnasjkdskajndjkanHelkl HALLLO");
+await p.keyboard.press("Enter");
+await p.keyboard.type("sdfsdfsdfsdfasddddd");
+await p.waitForTimeout(1500);
+await p.screenshot({ path: `${OUT}/look.png` });
+const box = await p.evaluate(() => {
+  const pm = document.querySelector(".ProseMirror").getBoundingClientRect();
+  const pane = document.querySelector(".note-editor").parentElement.getBoundingClientRect();
+  return { pm: { x: Math.round(pm.x), w: Math.round(pm.width) }, pane: { x: Math.round(pane.x), w: Math.round(pane.width) } };
+});
+console.log(JSON.stringify(box));
+await session.cleanup();
+await browser.close();
diff --git a/frontend/src/editor/editor.css b/frontend/src/editor/editor.css
index b413341..48842c2 100644
--- a/frontend/src/editor/editor.css
+++ b/frontend/src/editor/editor.css
@@ -38,10 +38,11 @@
      point where the eye reliably finds the start of the next line. Capped here
      rather than on the container so it holds on a page as well as off one. */
   max-width: 527px;
-  /* Left, not centred. A column that floats in the middle moves as the window
-     is resized, so the start of every line lands somewhere new; against the
-     margin it is always in the same place. */
-  margin-left: 0;
+  /* Centred. Pinning the column to the left edge put every line in the same
+     place, but on a wide window it left the whole right half of the pane as one
+     dead block — which is worse to look at than a column that moves. Centred,
+     the same leftover space reads as two margins. */
+  margin-left: auto;
   margin-right: auto;
   outline: none;
   color: var(--ne-text);