If you are using navigation UI in your application , if you want to hide your app bar (top bar of your app showing navigation icon) or back navigation arrow in a particular fragment you can do like this in your Mainactivity class MainActivity : AppCompatActivity() { class MainActivity : AppCompatActivity() { private lateinit var drawerlayout : DrawerLayout private lateinit var navView : NavigationView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) drawerlayout = findViewById(R.id.drawer_layout) navView = findViewById(R.id.nav_view) val navController : NavController = this.findNavController(R.id.navhost) NavigationUI.setupActionBarWithNavController(this,navController,drawerlayout) NavigationUI.setupWithNavController(navView,navController) navController.addOnDestinationChangedListener { _, destination, _ -> if(d...