By default, TPC stores just the block reference information with the drawing. This includes the block pathname, insert position, scale, rotation, color, etc. In essence, everything TPC needs to recreate that block in the drawing. The actual block data itself is stored in the block file.
If you plan on sharing drawings with someone who may not have the same blocks defined, you can include the block information in the drawing. TPC still creates a block reference, but uses the block data to build the block internally.
If TPC is unable to locate the block file, it displays the block filename in brackets like C:\COMMON\BLOCKS\MISC\LOGO.DXF} on the drawing at the insert point of the block. You can change the block so that it uses a block that is available to your computer.
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Editing a Block Reference
Using Blocks from Other CAD Programs
Converting Blocks to Groups
Grouping Drawing Objects No CAD Zone Drawings
Using Drawing View
Smart Drawing Objects
Working with Drawing Objects