Update README.md

Author: nums11

Samples/WinMLSamplesGallery/WinMLSamplesGallery/Samples/Batching/README.md

@@ -3,17 +3,24 @@
 
  Use this sample to compare inference runtime performace with and without batched inputs. 50 images will be passed through SqueezeNet for classification. Set a batch size and click Start Inference to compare.
 
-## Feedback
-Please file an issue [here](https://github.com/microsoft/Windows-Machine-Learning/issues/new) if you encounter any issues with the WinML Samples Gallery or wish to request a new sample.
-
 <img src="docs/BatchingScreenshot.png" width="650"/>
 
 - [Getting Started](#getting-started)
+- [BatchSizeOverride](#batchsizeoverride)
 - [Feedback]($feedback)
-- [External Links](#links)
+- [External Links](#external-links)
 
 ## Getting Started
 - Check out the [source](https://github.com/microsoft/Windows-Machine-Learning/blob/master/Samples/WinMLSamplesGallery/WinMLSamplesGallery/Samples/Batching/Batching.xaml.cs).
+- Learn how to [add the BatchSizeOverride property](https://github.com/microsoft/Windows-Machine-Learning/blob/master/Samples/WinMLSamplesGallery/WinMLSamplesGallery/Samples/Batching/Batching.xaml.cs#L125) to your session.
+- Learn how to [evaluate batched input](https://github.com/microsoft/Windows-Machine-Learning/blob/master/Samples/WinMLSamplesGallery/WinMLSamplesGallery/Samples/Batching/Batching.xaml.cs#L186).
+
+## BatchSizeOverride
+- Learn more about the BatchSizeOverride property from the [docs](https://docs.microsoft.com/en-us/uwp/api/windows.ai.machinelearning.learningmodelsessionoptions.batchsizeoverride?view=winrt-22000).
+- **Note**: To use batched inputs, the model must have a value of -1 or a variable name in the input batch dimension. Additionally, the DATA_BATCH Denotation must be added on the batch dimension. To edit your model you can use tools like [WinML Dashboard](https://github.com/Microsoft/Windows-Machine-Learning/tree/master/Tools/WinMLDashboard).
+
+## Feedback
+Please file an issue [here](https://github.com/microsoft/Windows-Machine-Learning/issues/new) if you encounter any issues with the WinML Samples Gallery or wish to request a new sample.
 
 ## External Links