# ATTREDEF Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [A](Help%20System/GSTARCAD/2027/Commands/A/(A).md) ## Function Description: This command is used to redefine a block and update associated attributes. ## Command Access: > **Icon: /** > **Menu: /** > **Ribbon: /** > **Toolbar: /** > **Command:** ATTREDEF > **Alias: /** ## Command Prompts: ``` Enter name of the block you wish to redefine: ``` --- **Related References：** - [Commands about Block Attributes (GstarCAD 2026)](../../../2026/Commands/00%20Command%20Groups/Commands%20about%20Block%20Attributes.md) **Related Concepts：** - [About Modifying Block Definitions (GstarCAD 2026)](../../../2026/Commands/02%20Concepts/About%20Modifying%20Block%20Definitions.md) **Related Tasks：** - [To Edit Attribute Definitions (GstarCAD 2026)](../../../2026/Commands/01%20Procedures/To%20Edit%20Attribute%20Definitions.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_A/ATTREDEF.html) · © Gstarsoft Co., Ltd.