A block can be composed of objects drawn on several layers with various properties. You can use several methods to create blocks.
You can use several methods to create blocks:
A block can be composed of objects drawn on several layers with various colors, linetypes, and lineweight properties. Although a block is always inserted on the current layer, the block reference preserves information about the original layer, color, and linetype properties of the objects that are contained in the block. You can control whether objects in a block retain their original properties or inherit their properties from the current layer, color, linetype, or lineweight settings.
A block definition can also contain elements that add dynamic behavior to the block. You add these elements to the block in the Block Editor. When you add dynamic behavior to a block, you add flexibility and intelligence to the geometry. When you insert a block reference with dynamic behavior in a drawing, you can manipulate the geometry of the block reference through custom grips or custom properties, depending on how the block was defined.
You can use PURGE to remove unused block definitions from a drawing.
You can also create blocks. For more information about creating and working with an annotative blocks, see .