# BLOCK Command line [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [Commands](Help%20System/GSTARCAD/2021/Commands/(Commands).md) → [B](Help%20System/GSTARCAD/2021/Commands/B/(B).md) Create block definition according to selected objects. ## Command Access: > **Command entry:** -BLOCK ## Command Prompts: > Name for new block, or ? to list existing blocks: > > Name for new block: > > Name the block. > > List existing blocks: > > List the block names in the text window. ## Other versions with matching text [GstarCAD 8 (2013–2014)](../../../2013/Commands/B/BLOCK%20Command%20line.md) · [GstarCAD 2015](../../../2015/Commands/B/BLOCK%20Command%20line.md) · [GstarCAD 2016](../../../2016/Commands/B/BLOCK%20Command%20line.md) · [GstarCAD 2017](../../../2017/Commands/B/BLOCK%20Command%20line.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/Commands/B/BLOCK%20Command%20line.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/Commands/B/BLOCK%20Command%20line.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/Commands/B/BLOCK%20Command%20line.md)