all items inside the effects toolbar item disappear when the items are not automatically generated and you tap on the effect toolbar again:
Example:
<telerikImageEditor:RadImageEditorToolbar Grid.Row="1" ImageEditor="{x:Reference imageEditor}" AutoGenerateItems="False" IsMultiLine="True"> <telerikImageEditor:EffectsToolbarItem AutoGenerateItems="False"> <telerikImageEditor:ContrastToolbarItem AutoGenerateItems="False"> <telerikImageEditor:CancelToolbarItem HorizontalOptions="Start" /> <telerikImageEditor:TemplateToolbarItem> <telerikImageEditor:TemplateToolbarItem.Template> <DataTemplate> <Slider Maximum="2" Minimum="0" Value="{Binding Value}" /> </DataTemplate> </telerikImageEditor:TemplateToolbarItem.Template> </telerikImageEditor:TemplateToolbarItem> <telerikImageEditor:ApplyToolbarItem HorizontalOptions="End" /> </telerikImageEditor:ContrastToolbarItem> </telerikImageEditor:EffectsToolbarItem> </telerikImageEditor:RadImageEditorToolbar>