How to expand "use block" at the top of class in PhpStorm 2017.1 by default to see all imported namespaces? Is there any setting? <img src="https://i.stack.imgur.com/9FCei.png" alt="enter image description here">

You can set these kind of settings in the <code>code folding</code> area. In this case these are <code>Imports</code> so check those off in the settings. Go to: Settings > Editor > General > Code folding See image. <img src="https://i.stack.imgur.com/Vp3J8.png" alt="Code folding">