# LAYEREVAL System Variable [GstarCAD 2027](Help%20System/GSTARCAD/2027/Index.md) → [System Variables](Help%20System/GSTARCAD/2027/System%20Variables/(System%20Variables).md) **Function Description:** The LAYEREVAL system variable is used to control whether to evaluate the layer list for new layers when added to the drawing or to attached xrefs. | | | | --- | --- | | Type | Integer | | Saved in | Drawing | | Initial value | 0 | | Range | 0,1,2 | **System Variable Value:** **0:** off **1:** detect when to add new layers of xrefs to the drawing **2:** detect when to add new layers to the drawing and xrefs **Note:** if specified the LAYEREVALCTL system variable to be 0, the settings of LAYEREVAL and LAYERNOTIFY will be ignored. --- [Original help](https://www.gstarcad.net/help/GstarCAD_2027_en-US/detail/systemVariables/LAYEREVAL.html) · © Gstarsoft Co., Ltd.