# EXTNAMES System Variable [GstarCAD 2017](Help%20System/GSTARCAD/2017/Index.md) → [System Variables](Help%20System/GSTARCAD/2017/System%20Variables/(System%20Variables).md) → [E](Help%20System/GSTARCAD/2017/System%20Variables/E/(E).md) **Function Description:** The EXTNAMES system variable is used to set parameters for named object names(such as blocks, linetype, and layers) saved in definition list. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 1 | | Range | 0,1 | **System Variable Value:** **0:** Names are limited to 31 characters in length. Names can include the letters A to Z, the numerals 0 to 9, and the special characters dollar sign ($), underscore (\_), and hyphen (-). **1:** Names are limited to 255 characters in length, and can include the letters A to Z, the numerals 0 to 9, spaces, and any special characters not used by Windows system and GstarCAD for other purposes. --- ## Other versions with matching text [GstarCAD 2016](../../../2016/System%20Variables/E/EXTNAMES%20System%20Variable--29b7c8851333.md) · [GstarCAD 2018](../../../2018/System%20Variables/E/EXTNAMES%20System%20Variable--29b7c8851333.md) · [GstarCAD 2019](../../../2019/System%20Variables/E/EXTNAMES%20System%20Variable--29b7c8851333.md) · [GstarCAD 2020](../../../2020/System%20Variables/E/EXTNAMES%20System%20Variable--29b7c8851333.md) · [GstarCAD 2021](Help%20System/GSTARCAD/2021/System%20Variables/E/EXTNAMES%20System%20Variable--29b7c8851333.md) · [GstarCAD 2022](Help%20System/GSTARCAD/2022/System%20Variables/E/EXTNAMES%20System%20Variable--29b7c8851333.md)