component width: Max(App.Width, App.MinScreenWidth) Components: New component -> and created MenuComponents New custom property -> Items Input Type Data Type: Table Table({Item:"Home"}, {Item:"Admin"}, {Item:"About"}, {Item:"Help"}); We have to create an output property, before that, I have added on vertical gallery in MenuComponents Gallery1 - with only text label Items: MenuComponent.Items It will show list of Menu's Now create an output property: New custom property-> Selected Output Type Data Type: Text click on created Selected property, click on advanced - > we observe Selected(Output) Gallery1.Selected.Item Which means we are passing an output. In our MenuComponent, since we already added on gallery control Hence Gallery1.Selected.Item which ever is selected been an output from our output property named as selected. What is Scope in components? In MenuComponent which we create, right hand side there is an option called ...