Merge pull request #10541 from MicrosoftDocs/warrenbryant-msft-explainpartial

updated explain formula to include partial - 11/4 publish

Author: mduelae

powerapps-docs/maker/canvas-apps/ai-formulas-formulabar.md

@@ -3,7 +3,7 @@ title: Use Copilot to create and edit Power Fx formulas in Power Apps
 description: Learn how to use Copilot, an AI feature in Power Apps, to create and edit Power Fx formulas in the formula bar from natural language or code comments.
 author: warrenbryant-msft
 ms.author: warrenbryant
-ms.date: 10/21/2024
+ms.date: 11/5/2024
 ms.topic: conceptual
 ms.reviewer: mkaur
 ms.subservice: canvas-maker
@@ -42,17 +42,17 @@ Use Copilot in the formula bar to understand what a formula is doing in plain la
 
 1. Select a control and its corresponding property.
 
-1. On the formula bar, select the **Copilot functionality menu** > **Explain this formula**.
+1. On the formula bar, select the **Copilot functionality menu** > **Explain this formula**, or select a subset of a formula and then select the **Copilot functionality menu** > **Explain this Selection** to explain only that part.
 
     :::image type="content" source="media/copilot/ufb-explain-copilot.png" alt-text="Screenshot of the Copilot functionality menu showing the Explain this formula item.":::
 
-    Copilot provides an explanation of the formula that you can copy and insert as a code comment or share with other makers who are working on the same app.
+    Copilot provides an explanation of the formula that you can copy and insert as a code comment or share with other makers who are working on the same app.  When explaining a selection, the Copilot may explain additional context around the selection if it is important to providing the explanation.
 
     :::image type="content" source="media/copilot/ufb-explanation-copilot.png" alt-text="Screenshot of Copilot's explanation of a formula.":::
 
 ### Known limitations of explaining formulas
 
-- The maximum length of a formula explanation is 5,000 characters.
+- The maximum length for a formula explanation is 5,000 characters. If the formula exceeds this limit, use a partial explanation to ensure it works.
 - Copilot only recognizes default properties in Power Apps.
 - Copilot doesn't recognize user-defined functions.