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When importing a floor, the most important thing to consider is the size. All other components that are part of the layout will error out if they do not fall inside the coordinates of the floor. It is recommended that you know the coordinates of most of your components before deciding the size of the floor. That is not to say the size cannot be changed at any point, but doing your research beforehand can save a great deal of time and effort down the road.
Floors
Aisle Paths
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