# UCSICON Dialog box [GstarCAD 2019](Help%20System/GSTARCAD/2019/Index.md) → [Commands](Help%20System/GSTARCAD/2019/Commands/(Commands).md) → [03 Dialog Boxes](Help%20System/GSTARCAD/2019/Commands/03%20Dialog%20Boxes/(Dialog%20Boxes).md) The UCS icon dialog box is used to control the style, visibility, and location of UCS icons.  Relative Glossary: **UCS icon style:** Control the display style of 2D or 3D UCS icon. > **2D** > Display the 2D icon without Z axis. > **3D** > Display the 3D icon. > **Lineweight:** > Control the lineweight of UCS icon when the 3D UCS icon is selected. **Preview:** Display the preview of UCS icon in model space. **UCS icon size:** Control the size of UCS icon according to size of viewport. The default size is 50, ranges from 5 to 95\. **Note:** the size of UCS icon is in proportion to its viewport size. **UCS icon color:** Control the UCS icon color in model space viewport and layout tab. > **Model space icon color:** > Control the UCS icon color in model space. > **Layout tab icon color:** > Control the UCS icon color in layout tab. > **Apply single color:** > Apply the selected UCS icon color in one model space to all 2D UCS icons. ## Other versions with matching text [GstarCAD 2016](../../../2016/Commands/03%20Dialog%20Boxes/UCSICON%20Dialog%20box.md) · [GstarCAD 2017](../../../2017/Commands/03%20Dialog%20Boxes/UCSICON%20Dialog%20box.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/Commands/03%20Dialog%20Boxes/UCSICON%20Dialog%20box.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/Commands/03%20Dialog%20Boxes/UCSICON%20Dialog%20box.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/Commands/03%20Dialog%20Boxes/UCSICON%20Dialog%20box.md)