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jamesmac1201
en respuesta a: Anonymous

If you're working on 2020 (same for 2018 and 2019) and you save the drawing (also save-as), the drawing will be converted to a 2018 version. In order to prevent this, you need to perform a save-as, then select "File of Type" pull down, then select the appropriate version (in your case "AutoCAD 2013/LT 2013 Drawing").

Because you're in a newer version of AutoCAD, just selecting save will update your drawing.

If you already saved the drawing to a newer version inadvertently, then you can perform an Export to... operation to convert the drawing back to an earlier release. We often have clients that have earlier versions of CAD than we do. Our drawings are newer, but I export the drawings down to an earlier version so they can use them.