# XREF Command [GstarCAD 2020](Help%20System/GSTARCAD/2020/Index.md) → [Commands](Help%20System/GSTARCAD/2020/Commands/(Commands).md) → [X](Help%20System/GSTARCAD/2020/Commands/X/(X).md) The XREF command is used to activate the EXTERNALREFERENCES command. **Command Access:** > **Command:** XREF Function Description: ![](Help%20System/GSTARCAD/2020/assets/GCAD_GCR/images/XREF-1.png) Inputting "-xref" under the command prompt, it will display options. ## Other versions with matching text [GstarCAD 2016](../../../2016/Commands/X/XREF%20Command--981d16f849ea.md) · [GstarCAD 2017](../../../2017/Commands/X/XREF%20Command--981d16f849ea.md) · [GstarCAD 2018](Help%20System/GSTARCAD/2018/Commands/X/XREF%20Command--981d16f849ea.md) · [GstarCAD 2019](../../../2019/Commands/X/XREF%20Command--981d16f849ea.md) · [GstarCAD 2021](../../../2021/Commands/X/XREF%20Command--981d16f849ea.md)