# PDFOSNAP System Variable [GstarCAD 2026](Help%20System/GSTARCAD/2026/Index.md) → [System Variables](Help%20System/GSTARCAD/2026/System%20Variables/(System%20Variables).md) → [P](Help%20System/GSTARCAD/2026/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 enabled for geometry in all PDF underlay attachments in the drawing --- [Original help](https://www.gstarcad.net/help/GstarCAD_2026_en-US/detail/systemVariables/PDFOSNAP.html) · © Gstarsoft Co., Ltd.