<t>Thank you very much, hansmex, for your detailed explanation. I appreciate it.<br/>
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so it is not the reduced width (or length) of the item as measured in the blueprint, but it is the full width (or length) of the item as measured in "real life", as Puybaret said.<br/>
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Puybaret, I would ...

ok, so is the "real life measurement" the size of the "box" as it is in the blueprint? or is it the actual size wall to wall of the house? That's what confused me. They are both "real life"..

<t>I just downloaded Sweet Home 3d, and uploaded a hand drawn really basic blueprint as a background image - as per the user guide.<br/>
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I put in the real life number of inches - 5 1/8", then say what the point of origin is - a corner of the plan, since I wasn't quite sure what "point of ...