Function Entry: ENTMOD

entmod

Host Function

(entmod elist)

• elist: entity definition association list

Autodesk documents that the entity name to modify is taken from group -1 in elist.

Modifies an entity in the drawing database according to the supplied entity definition list.

List or nil.

If successful, Autodesk documents that entmod returns the supplied elist; otherwise it returns nil.

Modifies the drawing database.

Erroneous if the entity definition list is invalid or requests an illegal modification.

Semantically paired with entget.

• AutoCAD 2026: documented (per Autodesk reference page).
• BricsCAD V26: presumed compatible (no contradicting page found).
• Status: AutoCAD documented; BricsCAD presumed-both pending Phase 4 verification.

• [entmod (AutoLISP)](https://help.autodesk.com/cloudhelp/2024/CHS/AutoCAD-LT-AutoLISP-Reference/files/GUID-C7D27797-247E-49B9-937C-0D8C58F4C832.htm)
• [About Modifying an Entity without the Command Function (AutoLISP)](https://help.autodesk.com/cloudhelp/2024/ENU/AutoCAD-MAC-AutoLisp/files/GUID-125DC058-BBAA-4CA9-A203-53F0A27B87D0.htm)

• Autodesk documents that an entity's type and handle cannot be changed.
• Autodesk documents that certain internal fields, such as the -2 group of a SEQEND, are ignored if modified.
• Autodesk documents that viewport entities cannot be modified with entmod.
• Autodesk documents that changing entities inside a block definition affects all inserts of that block.
• Autodesk documents special color behavior in AutoCAD 2004 and later: if true-color group 420 conflicts with ACI group 62, the true-color value takes precedence.