Selection Rectangle Highlighting is a free Chrome extension developed by Martin Huber. It falls under the category of Browsers and is classified as an Add-ons & Tools subcategory. This handy extension allows users to highlight any part of a webpage by drawing a selection rectangle, similar to the functionality on a desktop.

The main purpose of Selection Rectangle Highlighting is to enhance presentations during virtual meetings or online presentations. When sharing your browser window via platforms like Google Meet, Microsoft Teams, or Skype, you can use this extension to draw attention to specific areas of the page you are discussing. By drawing a rectangle around the relevant content, you can direct your audience's attention to the points you are talking about.

The extension works by pressing and holding the mouse button to draw a rectangle. Once you release the mouse button, the rectangle will disappear. If you enable "permanent mode," you can draw multiple rectangles that will remain visible until you remove them. Additionally, you have the option to choose from different colors to ensure the selection rectangle is clearly visible on the current page.

For more information and detailed instructions, users can refer to the help screen within the extension.