# EXTNAMES System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).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. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables/EXTNAMES.html) · © Gstarsoft Co., Ltd.