# OSOPTIONS System Variable [GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [System Variables](Help%20System/GSTARCAD/2021/System%20Variables/(System%20Variables).md) → [O](Help%20System/GSTARCAD/2021/System%20Variables/O/(O).md) **Function Description:** The OSOPTIONS system variable is used to control whether to suppress object snap on hatch objects, geometry with negative Z values, or dimension extension lines. | | | | --- | --- | | Type | Bitcode | | Saved in | Registry | | Initial value | 3 | | Range | 0 \~ 3 | **System Variable Value:** **0:** users could object snap on hatch objects and geometry with negative Z values when in dynamic UCS **1:** the object snap ignores hatch objects **2:** the object snap ignores geometry with negative Z values when in dynamic UCS --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/O/OSOPTIONS%20System%20Variable--e591e6085a39.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/O/OSOPTIONS%20System%20Variable--e591e6085a39.md) · [GstarCAD 2018](../../../2018/System%20Variables/O/OSOPTIONS%20System%20Variable--e591e6085a39.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/O/OSOPTIONS%20System%20Variable--e591e6085a39.md) · [GstarCAD 2020](../../../2020/System%20Variables/O/OSOPTIONS%20System%20Variable--e591e6085a39.md)