API Reference > presentation-backend > Core > PresentationManagerMode PresentationManagerMode Enumeration Presentation manager working mode. Members Name Value Description ReadOnly 0 Presentation manager assumes iModels are opened in read-only mode and avoids doing some workrelated to reacting to changes in iModels. ReadWrite 1 Presentation manager assumes iModels are opened in read-write mode and it may need toreact to changes. This involves some additional work and gives slightly worse performance. Defined in presentation/backend/src/presentation-backend/PresentationManager.ts Line 37 Last Updated: 29 November, 2022