Where is a “Sync project with gradle files” button in Android Studio 3?

Question

This button disappeared from a new 3.1 version of AS Toolbar. Before it showed as:

Now it's missing:

Answer 1

It hasn't disappeared. They have just moved it between the Save and Sync files button on the far left end of the toolbar.

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Edit: They like to keep playing with the toolbar.

Since Android Studio 3.3, the icon has been updated and moved back across to the right:

Answer 2

In Android Studio 3.3 it is here:

Answer 3

Is is available from menu. Tools > Android disappeared, so find it in File > Sync Project with Gradle Files.

Answer 4

For me I did following to make it visible:

1. Go to File -> settings -> Menus and Tool bar as shown
   

2. Click on Restore Default

You should see the Updated Android.MainToolBarGradleGroup as follows:

3. Click on Apply and restart the Android Studio

Answer 5

In Android Studio under 3.1 it's placed in

Tools > Android > Sync Project with Gradle Files