How can I enable that?

How can I configure IDEA to show breadcrumbs navigation and toolbar icons in the same line? Is this something special that is done by the Kotlin plugin or can I achieve this through configuration in IDEA?
Thanks,
Dirk
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Menu: View-> "Toolbar"
?
Cool, I never noticed that! Do you know since when this is available?
I believe since quite some time ago, when it was introduced