# Geometric Constraint [GstarCAD 2019](Help%20System/GSTARCAD/2019/Index.md) → [User Guide](Help%20System/GSTARCAD/2019/User%20Guide/(User%20Guide).md) → [Additional Pages](Help%20System/GSTARCAD/2019/User%20Guide/Additional%20Pages/(Additional%20Pages).md) ## **Geometric Constraint** Geometric Constraints are used to establish relationships between objects. They are positioned before the dimensional constraints are applied in order to define and preserve the general shape of the design. Geometric constraints can for example determine for two endpoints to always remain coincident or for specified lines to always remain parallel. 12 different types of geometric constraints, which also include auto constraint and visibility options, are supported by GstarCAD. [**Geometric Constraint Types**](Help%20System/GSTARCAD/2019/User%20Guide/Additional%20Pages/Geometric%20Constraint%20Types.md) [**Show and Hide Geometric Constraints**](Help%20System/GSTARCAD/2019/User%20Guide/Additional%20Pages/Show-Hide%20Geometric%20Constraints.md) [Constraint Display Settings](Help%20System/GSTARCAD/2019/User%20Guide/Additional%20Pages/Geometric%20Constraint%20Bar.md) [**AutoConstrain**](Help%20System/GSTARCAD/2019/User%20Guide/Additional%20Pages/AutoConstrain.md) --- Gstarsoft Co.,Ltd ## Other versions with matching text [GstarCAD 2017](../../../2017/User%20Guide/Additional%20Pages/Geometric%20Constraint.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/User%20Guide/Additional%20Pages/Geometric%20Constraint.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/User%20Guide/Additional%20Pages/Geometric%20Constraint.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/User%20Guide/Additional%20Pages/Geometric%20Constraint.md)