API Reference > imodeljs-frontend > Views > Viewport > onViewedCategoriesPerModelChanged onViewedCategoriesPerModelChanged Beta onViewedCategoriesPerModelChanged: BeEvent<(vp: Viewport) => void> = new BeEvent<(vp: Viewport) => void>() Event called on the next frame after this viewport's set of PerModelCategoryVisibility.Overrides changes. Defined in core/frontend/src/Viewport.ts Line 608 Last Updated: 13 June, 2024