# DIMCENTER Command [GstarCAD 2018](Help%20System/GSTARCAD/2018/Index.md) → [Commands](Help%20System/GSTARCAD/2018/Commands/(Commands).md) → [D](Help%20System/GSTARCAD/2018/Commands/D/(D).md) The DIMCENTER command is used to create center marks or center lines for circles or arcs. ## Command Access: > **Ribbon:** Annotation \> Dimension \> DIMCENTER > **Menu:** Dimension \> Center Mark > **Command:** DIMCENTER ## Command Prompts: > Select arc or circle: ## Function Description: The circle center could display as center mark or center lines. Users could set options of Center marks in Dimension Style Manager in Symbols and Arrows tab.  Uses could change display of center mark or modify its size in Dimension Style Manager. They could also change its settings by DIMCEN system variable.   ## Other versions with matching text [GstarCAD 2016](../../../2016/Commands/D/DIMCENTER%20Command.md) · [GstarCAD 2017](../../../2017/Commands/D/DIMCENTER%20Command.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/Commands/D/DIMCENTER%20Command.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/Commands/D/DIMCENTER%20Command.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/Commands/D/DIMCENTER%20Command.md)