The screen material uses a special shader nodeset to emulate the real-world screen behavior (it acts like it has real pixels). You can attach any image to this that has a aspect ratio of 16:9. You can also easily change the laptop screen resolution by seeting proper values in the two Multiply nodes (just to the right of the two Gradient Texture nodes) - the top for vertical, and the bottom for horizontal resolution. All the parts - the lap with the screen, communication ports, optical drive are parented to the main_part object, so use it as a handler when doing any transformations. The laps pivot is set on its rotation axis, so you can easily open and close it by rotating along its local X-axis (An angle from 0 to 120 degrees is recommended ).