What is the purpose of using overlays in AutoCAD?

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Overlays in AutoCAD are used to superimpose one drawing on top of another for comparison or reference purposes.

Overlays allow users to easily compare different versions of a drawing by superimposing them on top of each other.
They can be used to reference external files or images within the current drawing.
Overlays can help in coordinating different disciplines' drawings, such as architectural and structural plans.
They are useful for checking alignment, dimensions, and other details between different drawings.
Examples of overlays include placing a site plan over a floor plan to ensure proper alignment, or overlaying a scanned image for tracing purposes.

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