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CAD tip CAD tip # 6475:

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Q - question

What is the difference between the properties BYBLOCK and BYLAYER?

A - answer AutoCAD entities (objects) grouped in a block can have two special properties: BYBLOCK (by block) and BYLAYER (by layer). These properties influence how the entity will be displayed when the block is inserted (referenced) in a drawing. You can use these values for the color, linetype, linewidth and plot style properties.

  • The BYLAYER setting for block components means - inherit the properties from the layer the block is inserted in.
  • The BYBLOCK setting for block components means - inherit the properties from the properties of the block (the block reference/insertion).

So if you have e.g. a block inserted in the layer LAY (colored green) and you assign it (Ctrl+1) the color red, a line (in the block) with the color BYLAYER will be green and a line with the color BYBLOCK will be red.

Please note that the property names are localized in non-English AutoCAD versions. So it could be e.g. VONLAYER and VONBLOCK (German), DUCALQUE and DUBLOC (French), DLEHLAD and DLEBLOK (Czech).

100% *  CAD 
13.1.2009    24222×  
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applies to: AutoCAD · AutoCAD LT ·

See also:
Tip 13858:Is there also a SETBYBLOCK command?
Tip 13435:Bulk setting of layer properties according to the object in that layer.
Tip 12279:PropByLayer - an inverse function to SetByLayer.
Tip 10921:The tolerance frame is displayed or printed in different line weight.
Tip 10574:Four methods for exploding blocks in AutoCAD.

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