using PixiEditor.Extensions.Sdk; namespace FlyUISample; public class FlyUiSampleExtension : PixiEditorExtension { public override void OnInitialized() { WindowContentElement content = new WindowContentElement(); var popup = Api.WindowProvider.CreatePopupWindow("Sample Window", content); content.Window = popup; popup.Width = 800; popup.Height = 720; popup.Show(); } }