# PDFOSNAP System Variable [GstarCAD 2019](Help%20System/GSTARCAD/2019/Index.md) → [System Variables](Help%20System/GSTARCAD/2019/System%20Variables/(System%20Variables).md) → [P](Help%20System/GSTARCAD/2019/System%20Variables/P/(P).md) **Function Description:** The PDFOSNAP system variable is used to determine whether to active object snap for geometric drawing in PDF underlay attached in drawing | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | **System Variable Value:** **0:** object snapping is disabled for geometry in all PDF underlay attachments in the drawing **1:** object snapping is disabled for geometry in all PDF underlay attachments in the drawing --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/P/PDFOSNAP%20System%20Variable--f2e08bb01e45.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/P/PDFOSNAP%20System%20Variable--f2e08bb01e45.md) · [GstarCAD 2018](../../../2018/System%20Variables/P/PDFOSNAP%20System%20Variable--f2e08bb01e45.md) · [GstarCAD 2020](../../../2020/System%20Variables/P/PDFOSNAP%20System%20Variable--f2e08bb01e45.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/P/PDFOSNAP%20System%20Variable--f2e08bb01e45.md)