Customize PDF Viewer in Flutter 
ComPDFKit PDF SDK for Flutter allows you to customize the user interface of your application by hiding buttons or toolbars.
For detailed configurable options, please refer to CONFIGURATION.md.
Key Capabilities 
- ToolBars - Hide or add function buttons.
Guides for Customizing the UI 
How to show or hide toolbar buttons
How to customize the annotation toolbar
How to customize the content editor toolbar
How to customize the form toolbar
How to customize the signature toolbar.
How to change the language in our ComPDFKit PDF SDK for Flutter
The toolset includes APIs for page editing dialogs, watermark addition dialogs, security settings, etc. Users can directly invoke and open the corresponding features via CPDFReaderWidgetController to implement these functionalities in Flutter.
Used to configure the context menu options that pop up when a annotations, text, image, etc. is selected.
How to show or hide the user interface.
How to configure the BOTA interface to show or hide features and menu options.
How to configure the bottom menu options in the page editing interface.