# BACTIONSET Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [B](Help%20System/GSTARCAD/2027/Commands/B/(B).md) ## Function Description: This command is used to specify action selection set associated with an action in a dynamic block definition. Redefines which objects are associated with an action. The BACTIONSET command only allowed in Block Editor. This command is disabled when the BACTIONBARMODE system variable is set to 1. ## Command Access: > **Icon:** / > **Menu:** / > **Ribbon:** / > **Toolbar:** / > **Command:** BACTIONSET > **Alias:** / ## Command Prompts: ``` Select action object: ``` --- **Related References：** - [Commands about Dynamic Blocks (GstarCAD 2026)](../../../2026/Commands/00%20Command%20Groups/Commands%20about%20Dynamic%20Blocks.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_B/BACTIONSET.html) · © Gstarsoft Co., Ltd.