# APERTURE Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [A](Help%20System/GSTARCAD/2027/Commands/A/(A).md) ## Function Description: This command is used to control the size of the object snap target box. ## Command Access: > **Icon:** / > **Menu:** / > **Ribbon:** / > **Toolbar:** / > **Command:** APERTURE > **Alias:** / ## Command Prompts: ``` Enter new value for APERTURE <10>: ``` Object snaps become active when the object snap target box passes over an object location such as an intersection or endpoint. Users can get a bigger Aperture size by setting a higher value for APERTURE system variable. The APBOX system variable controls whether the object snap target box is displayed. These settings can also be made in “Draw” label in the “Options” dialog box.  To change the object selection pickbox that is displayed at the Select Object prompt, use the PICKBOX system variable.  --- **Related References：** - [Commands about Object Snap (GstarCAD 2026)](../../../2026/Commands/00%20Command%20Groups/Commands%20about%20Object%20Snap.md) **Related Concepts：** - [About Using Object Snaps (GstarCAD 2026)](../../../2026/Commands/02%20Concepts/About%20Using%20Object%20Snaps.md) **Related Tasks：** - [To Display the Object Snap Menu (GstarCAD 2026)](../../../2026/Commands/01%20Procedures/To%20Display%20the%20Object%20Snap%20Menu.md) - [To Set Running Object Snaps (GstarCAD 2026)](../../../2026/Commands/01%20Procedures/To%20Set%20Running%20Object%20Snaps.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_A/APERTURE.html) · © Gstarsoft Co., Ltd.