problems connecting to an external monitor with extended workspace

I have a MacBook Pro (retina, 13 inches, early 2015) with OS X El Capitan. I can not connect an external monitor as extended workspace (mirror works). Any help and suggestions please.

What happens when you try? IS extended not available?

What is the resolution of the external display?

This is the Office Mac Pro forum. I asked that your post moved to the forum of laptop MacBook Pro or another appropriate forum.

Tags: Notebooks

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