Toolbar not showing in the layout editor of Android Studio 3.6.1

After updating android studio to 3.6.1 Toolbar not showing in the layout editor.

It's showing like this..

But it should be like this.

Number 3 Option not showing in my case.

Ok as far as I think there's no option to show or hide the specific toolbar you are mentioning in your question. Android Studio seems to be doing it by default.

The issue in your case is that android studio will show the toolbar if you open the any layout.xml inside the layout folder in your res folder. Try opening an xml inside layout it should be showing this by default.

As visible from your screenshot you have opened an xml from menu folder. The layout editor in this case only shows the contents in your main_menu.xml like a dropdown list etc. and not how it appears in the actual layout if I am not wrong.

If this menu is include in some layout's xml file in the layout folder try opening that to see the contents and the toolbar you mentioned.

See if this works for you