Highlighter Pro is a tool inspired by Medium.com, designed to empower WordPress sites with text highlighting and inline commenting features. Here's a breakdown of its functionalities:

Features:

1. Text Highlighting: Users can highlight text directly on the page and add inline notes/comments to the highlights.
2. Save and Delete Highlights: Users have the ability to save or delete their highlights, along with viewing their existing highlights.
3. View Other Reader's Highlights: Access other readers' highlights and engage in conversations about the content.
4. Statistics Engine: Offers comprehensive statistics to track trending posts based on metrics like the number of highlights, notes, and total highlighters.
5. Custom Display Options: Flexible display options to choose which highlights to display per post, their labels, placement, and other style-related preferences.
6. Compatibility: Works seamlessly across posts, pages, homepage, archive listings, and custom post types, ensuring broad usability.
7. Simultaneous Usage: Engineered to handle large crowds, enabling multiple users to highlight simultaneously without conflicts or interruptions.

Main Features:

• Inline comments and discussion
• Share highlights on social media platforms
• Multiple highlighter colors and custom color options
• Overlapping and nested highlights support
• AJAX-based front-end login/register system for a smooth user experience
• Real-time top highlight feature
• Compatible with touch devices

Shortcodes:

Highlighter Pro offers nine built-in shortcodes that allow you to display various information about your highlights, including top highlighted posts, cumulative stats, and more.

Compatibility and Testing:

• Browser compatibility: Chrome, Firefox, Opera, Safari, Microsoft Edge, IE11, Chrome Mobile, Safari Mobile
• Tested on various devices: MacBook Pro, HP Touchscreen laptop, iPad, iPhones
• Compatibility with multiple WordPress themes like TwentySeventeen, Implicit, Explicit, Engine, Techwise, and more, both premium and directory themes.

Highlighter Pro is a feature-rich tool that enriches user engagement by allowing text interaction and discussion, akin to the experience on Medium.com, on WordPress websites.