diff --git a/content/blog/v7-13-formulas-and-regex/formula_audit_demo.png b/content/blog/v7-13-formulas-and-regex/formula_audit_demo.png
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diff --git a/content/blog/v7-13-formulas-and-regex/index.md b/content/blog/v7-13-formulas-and-regex/index.md
index 4f07553..18fca40 100644
--- a/content/blog/v7-13-formulas-and-regex/index.md
+++ b/content/blog/v7-13-formulas-and-regex/index.md
@@ -116,7 +116,7 @@ Formulas can reference three runtime values, resolved when the formula is evalua
 * `DC.USER_NAME` - the logged-in user id.
 * `DC.ORIG_VALUE` - the original cell value before the current edit.
 
-Our demo formula table puts them all to work. There's a row-status column (`=DC.ROW_STATUS`), a user column (`=DC.USER_NAME`), and a change summary that reads like a proper audit sentence:
+Our demo formula table puts them all to work. There's a row-status column (`=DC.ROW_STATUS`), a user column (`=DC.USER_NAME`), and a `CHANGE_SUMMARY_COL` whose rule reads like a proper audit sentence:
 
 ```
 =IF( DC.ROW_STATUS ="U","unedited",
@@ -127,7 +127,11 @@ Here it is live in the editor. We edited `B_COL` on the second row from 10 to 25
 
 ![](./formula_demo.png)
 
-Behind the columns shown here, the same edit also resolved the change-summary formula from the snippet above to "root changed from orig-2" - because `DC.ROW_STATUS` is a live reference, the status updates as the user works: edit a cell and the stamp flips to your user id; cancel the edit and it reverts.
+And here's the payoff of those `DC.*` references - the audit columns from the same table, same edit. `ROW_STATUS_COL` flipped to `M`, and the change summary resolved the `IF` formula above into a sentence - "root changed from orig-2":
+
+![](./formula_audit_demo.png)
+
+Because `DC.ROW_STATUS` is a live reference, it updates as the user works: edit a cell and the stamp flips to your user id; cancel the edit and it reverts.
 
 ### Editor behaviour worth knowing