My printer (well, PrusaSlicer) always starts with a line around the object I am printing. See (1) in the image. --Why? What does that do?

There is also this line (2) at the front of the bed. --Why? What does that do?

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[–] 8 points 2 years ago

In addition to what others have said, it also gives you an indication of how well leveled your bed is in the immediate area of the print.

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