How do I hide the navigation bar in the editor for android studio?

How do I make the bottom navigation bar disappear in the visual XML editor in Android Studio? I added a screenshot of the navigation bar which I want to remove.

I have looked at both of these and they were no help to me.
How to hide navigation bar permanently in android activity?
How to emulate immersive mode in layout editor

Here is the screenshot of the Navigation bar: https://imgur.com/gallery/GlmDsIs

Here is my XML Code for activity_main:

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#474747"
tools:context=".MainActivity">

<EditText
android:id="@+id/typeMessage"
android:layout_width="354dp"
android:layout_height="61dp"
android:layout_marginTop="504dp"
android:background="#595858"
android:ems="10"
android:hint="Type..."
android:inputType="text"
android:padding="10dp"
android:textColorHint="#969494"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />

<ImageView
android:id="@+id/imageView2"
android:layout_width="60dp"
android:layout_height="59dp"
android:layout_marginEnd="8dp"
android:layout_marginRight="8dp"
android:layout_marginTop="504dp"
app:layout_constraintEnd_toEndOf="@+id/typeMessage"
app:layout_constraintTop_toTopOf="parent"
app:srcCompat="@android:drawable/ic_menu_send" />

<EditText
android:id="@+id/messageOutput"
android:layout_width="354dp"
android:layout_height="480dp"
android:background="#595858"
android:ems="10"
android:inputType="textMultiLine"
app:layout_constraintBottom_toTopOf="@+id/typeMessage"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.5"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent" />
</android.support.constraint.ConstraintLayout>


Here is my code for MainActivity.java:

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}


Thank you for your help!

I think this may be what you're looking for: stackoverflow.com/questions/21724420/…
– Nick
Jun 30 at 3:24

See stackoverflow.com/questions/23291890/…
– Tyler V
Jun 30 at 3:28

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