# Any flutterweb integration sample available?

**URL:** <https://pdfjs.community/t/any-flutterweb-integration-sample-available/2921>\
**Category:** Technical Support\
**Created:** [October 31, 2023, 5:45pm UTC](https://pdfjs.community/t/any-flutterweb-integration-sample-available/2921 "2023-10-31T17:45:17Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![kkim](https://avatars.discourse-cdn.com/v4/letter/k/3ab097/32.png) [@kkim](https://pdfjs.community/u/kkim)\
**Post date:** [November 6, 2023, 6:44pm UTC](https://pdfjs.community/t/any-flutterweb-integration-sample-available/2921/6 "2023-11-06T18:44:43Z")

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Hi there,

1. For add/modify/delete, please use exportAnnotationCommand:  
[PDFJS Express WebViewer Class: AnnotationManager](https://pdfjs.express/api/Core.AnnotationManager.html#exportAnnotationCommand__anchor)

2. To customize the measurement count icons, please take a look at this forum post here:  
[To replace Count tool icon by custom icon [Pdfjs-express 7.0] - #2 by Logan](https://pdfjs.community/t/to-replace-count-tool-icon-by-custom-icon-pdfjs-express-7-0/174/2)

3. To add buttons on top toolbar, please check this guide here:  
[PDF.js Express Viewer Customize Toolbar | Documentation](https://pdfjs.express/documentation/ui-customization/customizing-header.8#actionbutton)

4. Count tool is an extension of stickyCreate Tool, so you can modify the sticky annotations using their ‘color’ property, i.e.  
StickyAnnotation.Color = new Annotations.Color(255, 255, 255)

5. You can hide elements in the UI with the following guide:  
[Hide & Disable Buttons in PDF.js Express Viewer | Documentation](https://pdfjs.express/documentation/ui-customization/hiding-elements#find-data-element-attribute-values)  
(also in the customizing header guide above)

6. You can disableElement using the above guide for this, i.e.

```javascript
instance.UI.disableElement('notesPanel')

```

1. Some annotations do not have fill color, but for those that do, you can follow the same steps as above:

```javascript
Annotation.FillColor = new Annotations.Color(255, 0, 255)

```

Best regards,  
Kevin Kim

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