# ERHIGHLIGHT System Variable [GstarCAD 2022](Help%20System/GSTARCAD/2022/Index.md) → [System Variables](Help%20System/GSTARCAD/2022/System%20Variables/(System%20Variables).md) → [E](Help%20System/GSTARCAD/2022/System%20Variables/E/(E).md) **Function Description:** The ERHIGHLIGHT system variable is used to control whether to highlight the reference name or reference object when selecting corresponding reference content in the External Reference palette. | | | | --- | --- | | Type | Integer | | Saved in | Registry | | Initial value | 1 | | Range | 0,1 | **System Variable Value:** **0:** do not highlight reference objects **1:** highlight reference objects