AI Summary

Using a spare laptop as a second monitor isn’t as simple as plugging in an HDMI cable; it requires a few configuration tweaks. You can choose to mirror the display—showing the same desktop on both screens—for presentations, or extend the desktop to create a wider workspace that supports more visible tabs and easier multitasking. Extending the screen can boost productivity without purchasing additional hardware. The guide explains how to set up these dual‑monitor modes using the existing laptop, avoiding the need for a fancy new setup.

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