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?
this post was submitted on 12 Oct 2023
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Further to what others have said, if you turn on advanced settings you can control the hight of the skirt (the bit around it) so it's the full height of the model for example.
This is useful for more difficult materials that shrink a lot etc as it effectively builds an enclosure for the print as it goes along.