diff --git a/trailer.html b/trailer.html
index 10db796..2cbfee2 100644
--- a/trailer.html
+++ b/trailer.html
@@ -309,6 +309,12 @@
           + 'Each other model reads ONLY this script - no book - and says what it understood.">'
           + (REVIEWS.length ? "Test it again" : "Does it make sense? Ask " + others + " readers")
           + '</button>');
+      out.push('<button type="button" class="btn" data-measure="' + esc(meta.id)
+        + '" title="Speaks every line in the cast voices and reports what the '
+        + 'trailer really runs.">'
+        + ((PKG.timing && PKG.timing.measured_seconds) ? "Time it again" : "Time it for real")
+        + '</button>');
+
       if (RUN.stage === "revising")
         out.push('<button type="button" class="btn" disabled>Rewriting…</button>');
       else if (REVIEWS.length || Object.keys(NOTES).length)
@@ -414,7 +420,8 @@
       + (Number(meta.iteration) > 1 ? ' &middot; revision ' + meta.iteration : '')
       + ' &middot; ' + shots.length + ' shots &middot; '
       + Math.floor(secs / 60) + ':' + String(Math.round(secs % 60)).padStart(2, "0")
-      + ' &middot; ' + cast.length + ' characters</p>';
+      + ' &middot; ' + cast.length + ' characters</p>'
+      + timingHtml();
 
     var probs = draft.problems
       ? '<div class="probs"><b>The checker has objections</b><ul>'
@@ -596,6 +603,15 @@
       r = await act("draw_storyboard", { draft_id: el.getAttribute("data-draw") });
       if (r) await refresh(); return;
     }
+    if ((el = hit("data-measure"))) {
+      el.disabled = true; el.textContent = "Speaking every line…";
+      r = await act("measure_script", { draft_id: el.getAttribute("data-measure") });
+      if (r) {
+        showMsg("msg", "Speaking every line in the cast voices. A minute or two.", "ok");
+        setTimeout(refresh, 20000);
+      }
+      return;
+    }
     if ((el = hit("data-review"))) {
       el.disabled = true;
       r = await act("start_review", { run_id: runId }); if (r) await refresh(); return;