PLATO Highlighter is a Chrome add-on developed by fienestar that provides a convenient way to track lecture and assignment status on PLATO's course pages. With this tool, users can easily see the status of recorded lectures and assignments through color-coded highlights.

For recorded lectures, the tool displays a color next to the lecture title based on the attendance status marked with O/X in the online attendance list. This helps users quickly identify which lectures they have attended.

Similarly, for assignments, the tool uses different colors to indicate the submission status. Users can also see the scores assigned to graded assignments alongside the color-coded highlights.

One of the standout features of PLATO Highlighter is the ability to customize the colors. Users can easily set their preferred colors by clicking on the extension icon or accessing the options page through a right-click.

Additionally, the tool also provides file status indicators. When a file has been clicked, it is marked with a different color, providing a visual cue to users. This data is stored locally in the browser. Users can choose to disable this feature by setting the colors to be the same in the options.

Lastly, for users who prefer not to download lecture files, PLATO Highlighter offers an option to play the lecture directly on the course page, saving time and storage space.

Overall, PLATO Highlighter is a valuable tool for students using the PLATO platform, offering an intuitive way to track lecture and assignment statuses through color-coded highlights and customization options.