Final answer:
A cyan box around the cursor typically signals an accessibility feature or focus mode is enabled to help users track the cursor's position more easily.
Step-by-step explanation:
When you see a cyan box around the cursor, it usually signifies that a specific user interface or accessibility feature is activated. For instance, in some text editors or development environments, a feature often called caret browsing or focus mode might be turned on, highlighting the cursor's position so it is more easily seen by visually impaired users or those who prefer a more distinct cursor indicator.
The appearance of visual elements like the cyan box can also be a choice in user preferences settings where the user can customize the color of the cursor highlight. It's generally intended to enhance visibility and user interaction, helping those with certain sight challenges or anyone who wants to better track where they're typing or navigating on the screen.