# PREVIEWEFFECT System Variable [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [System Variables](Help%20System/GSTARCAD/2022/System%20Variables/(System%20Variables).md) → [P](Help%20System/GSTARCAD/2022/System%20Variables/P/(P).md) **Function Description:** The PREVIEWEFFECT system variable is used to specify the preview visual effect when selecting objects. | | | | --- | --- | | Type | Integer | | Saved in | Not saved | | Initial value | 2 | | Range | 0,1,2 | **System Variable Value:** **0:**dashed(default display style for selected objects) **1:** bold line **2:** dashed and bold line ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/P/PREVIEWEFFECT%20System%20Variable--9f5f2752044e.md) · [GstarCAD 2017](Help%20System/GSTARCAD/2017/System%20Variables/P/PREVIEWEFFECT%20System%20Variable--9f5f2752044e.md) · [GstarCAD 2018](../../../2018/System%20Variables/P/PREVIEWEFFECT%20System%20Variable--9f5f2752044e.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/System%20Variables/P/PREVIEWEFFECT%20System%20Variable--9f5f2752044e.md) · [GstarCAD 2020](../../../2020/System%20Variables/P/PREVIEWEFFECT%20System%20Variable--9f5f2752044e.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/P/PREVIEWEFFECT%20System%20Variable--9f5f2752044e.md)