Changed readme file content.

Author: LavanyaA

README.md

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 # axis-labels-customization-flutter-cartesian-chart
-Customize the axis labels in Flutter Cartesian chart
+
+The Flutter Cartesian Chart widget provides support for customizing the axis labels in the chart using the callback events on rendering. A callback event is a callback function or method, which you pass as an argument in another function or method and can perform an action when you require it. Likewise, the chart widget provides a callback event called axisLabelFormatter to customize the axis labels as required. 
+
+Documentation: https://help.syncfusion.com/flutter/cartesian-charts/callbacks#axislabelformatter 
+
+## Requirements to run the demo
+* [VS Code](https://code.visualstudio.com/download)
+* [Flutter SDK v2.0.0+](https://flutter.dev/docs/development/tools/sdk/overview)
+* [For more development tools](https://flutter.dev/docs/development/tools/devtools/overview)
+
+## How to run this application
+To run this application, you need to first clone or download the ‘axis labels customization flutter cartesian- hart’ repository and open it in your preferred IDE. Then, build and run your project to view the output.
+
+## Further help
+For more help, check the [Syncfusion Flutter documentation](https://help.syncfusion.com/flutter/introduction/overview), or
+ [Flutter documentation](https://flutter.dev/docs/get-started/install).