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CAD tip CAD tip # 5688:

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Where do the layers like "Layer @ 10" or "Layer @ 16" come from?

A - answer When you save a DWG drawing from AutoCAD 2008 to an older version and this drawing contains annotation type objects (with automatic scaling), AutoCAD may convert these objects to separate objects divided into individual layers by the viewport scales used.

This conversion is controlled by the "Maintain visual fidelity for annotative objects" in the Options dialog, the "Open & Save" tab (see also the VISUALFIDELITY variable). In an older version of AutoCAD, these divided objects are stored in generated layers with the " @ given_scale" suffix.

It is recommended to switch off this option for drawings without layout viewports or annotative objects.

100% *  CAD 
3.8.2007    8786x  
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See also:
Tip 10952:All DWG texts in UPPERCASE.
Tip 10926:Self-intersecting polylines and polylines with duplicate vertices.
Tip 10903:How to import an Illustrator file (.AI) into AutoCAD (.DWG)?
Tip 10804:What features are not available in the 32-bit version of AutoCAD 2017 and 2016?
Tip 10702:How to find which AutoCAD version was used to save a particular DWG drawing?

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