# GCSMOOTH Command [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [Commands](Help%20System/GSTARCAD/2027/Commands/(Commands).md) → [G](Help%20System/GSTARCAD/2027/Commands/G/(G).md) ## Function Description: The spline curve is constrained to be continuous and maintain G2 continuity with other spline curves, straight lines, circular arcs or multi-segment lines ## Command Access: Icon: Menu Item: Parameters (P) > Geometric Constraints (G) > Smooth (M) Ribbon: Parameters > Geometric > Smooth Toolbar:/ Command Line: GCSMOOTH Command Alias: / ## Command Prompts: ``` Please select the first spline: select the object you want to smooth ``` ``` Please select the second spline: select the object that satisfies G2 continuity with the first object ``` ## Operation Steps: 1、Select two spline curves and add smoothness constraints as shown in the figure; 2、The two spline curves satisfy G2 continuity;  --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/commandReferences_G/GCSMOOTH.html) · © Gstarsoft Co., Ltd.