# PLANESURF Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [P](Help%20System/GSTARCAD/2027/Commands/P/(P).md) ## Function Description: This command is used to create a planar surface by selecting closed objects or by specifying the opposite corners of a rectangular surface. When the corners of the surface are specified by the command, you can create a surface parallel to the work plane. The SURFU and SURFV system variables control the number of lines displayed on the surface. ## Command Access: > **Icon:**  > **Menu:** Draw > Modeling > Surfaces > Planar > **Ribbon:** Surface > Create > Plan > **Toolbar:** Modeling > Planar Surface > **Command:** PLANESURF > **Alias:** / ## Command Prompts: ``` Specify first corner or [Object] <Object>: ``` ## Specify first corner/other corner Specifies a first and second point to define the rectangular planar surface. ## Object Creates a planar or trimmed surface by object selection. You can select one closed object or multiple objects that form a closed area. Valid objects include: lines, circles, arcs, ellipses, elliptical arcs, 2D polylines, planar 3D polylines and 2D splines. The DELOBJ system variable controls whether the objects that you select are automatically deleted when the surface is created. --- **Related References：** - [Commands about Creating Procedural Surfaces (GstarCAD 2026)](../../../2026/Commands/00%20Command%20Groups/Commands%20about%20Creating%20Procedural%20Surfaces.md) **Related Tasks：** - [To Create a Planar Surface (GstarCAD 2026)](../../../2026/Commands/01%20Procedures/To%20Create%20a%20Planar%20Surface.md) - [To Convert Objects to Procedural Surfaces (GstarCAD 2026)](../../../2026/Commands/01%20Procedures/To%20Convert%20Objects%20to%20Procedural%20Surfaces.md) --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_P/PLANESURF.html) · © Gstarsoft Co., Ltd.