API Reference > imodeljs-backend > iModels > TxnManager > onModelGeometryChanged onModelGeometryChanged Readonly onModelGeometryChanged: BeEvent<(changes: undefined) => void> = ... Event raised after the geometry within one or more GeometricModels is modified by applying a changeset or validation of a transaction. A model's geometry can change as a result of: Insertion or deletion of a geometric element within the model; or Modification of an existing element's geometric properties; or An explicit request to flag it as changed via IModelDb.Models.updateModel. Defined in core/backend/src/TxnManager.ts Line 340 Last Updated: 11 June, 2024