title: I can't see the three vertical dots in my emulator action bar on my device
body: <p>when i see my activity_main.xml layout in android studio it shows the three dotted vertical menu <a href="https://i.stack.imgur.com/4TaPe.png" rel="nofollow noreferrer">in android studio</a> but when i launch my app in my android device there is no vertical dotted<a href="https://i.stack.imgur.com/VFO7K.png" rel="nofollow noreferrer">in my android device</a>.</p>