# Convert BLOCK to XREF [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [User Guide](Help%20System/GSTARCAD/2027/User%20Guide/(User%20Guide).md) → [Express Tools](Help%20System/GSTARCAD/2027/User%20Guide/Express%20Tools/(Express%20Tools).md) → [Blocks](Help%20System/GSTARCAD/2027/User%20Guide/Express%20Tools/Blocks/(Blocks).md) The BLOCKTOXREF command is used to replace all instances of a standard block with an xref. Unbind xrefs that are bound. BLOCKTOXREF searches the entire drawing for references to a specified block name and replaces them with an xref that you specify. You can have the unreferenced block purged when done. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/GUG_ET_Blocks/Convert%20BLOCK%20to%20XREF.html) · © Gstarsoft Co., Ltd.