# Highlight tool trigger as left click

**URL:** <https://pdfjs.community/t/highlight-tool-trigger-as-left-click/1664>\
**Category:** Technical Support\
**Created:** [May 10, 2022, 7:34am UTC](https://pdfjs.community/t/highlight-tool-trigger-as-left-click/1664 "2022-05-10T07:34:16Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![system](https://canada1.discourse-cdn.com/flex031/uploads/pdfjscommunity/original/1X/ffbcd25c7d423db8d5acd5db201c272f4db306dd.png) [@system](https://pdfjs.community/u/system)\
**Post date:** [May 10, 2022, 7:34am UTC](https://pdfjs.community/t/highlight-tool-trigger-as-left-click/1664/3 "2022-05-10T07:34:22Z")

</div>

**Hello, I’m Ron, an automated tech support bot 🤖**

While you wait for one of our customer support representatives to get back to you, please check out some of these documentation pages:

Guides:
- [Customize annotation tools - Extend built in tools](https://pdfjs.express/documentation/annotation/customizing-tools.8#extend-built-in-tools)
- [Customizing WebViewer UI Popups](https://pdfjs.express/documentation/ui-customization/customizing-popup.8)
- [Customize toolbar in viewer - Header items - ActionButton](https://pdfjs.express/documentation/ui-customization/customizing-header.8#actionbutton)

APIs:
- [Tools.CalloutCreateTool - mouseLeftUp(e)](https://pdfjs.express/api/7.0/Tools.CalloutCreateTool.html#mouseLeftUp__anchor)
- [Tools.GenericAnnotationCreateTool](https://pdfjs.express/api/7.0/Tools.GenericAnnotationCreateTool.html#__anchor)
- [Tools.EllipseCreateTool - mouseLeftUp(e)](https://pdfjs.express/api/7.0/Tools.EllipseCreateTool.html#mouseLeftUp__anchor)

Forums:
- [On double click/Enter, i want to finish marking of annotation where the last point was set and not where the cursor is present](https://pdfjs.community/t/on-double-click-enter-i-want-to-finish-marking-of-annotation-where-the-last-point-was-set-and-not-where-the-cursor-is-present/446/3)
- [Force tool button panToolButton starting enabled by default](https://pdfjs.community/t/force-tool-button-pantoolbutton-starting-enabled-by-default/1449/1)
- [Customization of “stickyToolGroupButton”](https://pdfjs.community/t/customization-of-stickytoolgroupbutton/197/1)

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_[View the full topic](https://pdfjs.community/t/highlight-tool-trigger-as-left-click/1664)._