title: How to navigate to parent folder of current file in Project Explorer view using keyboard shortcut in Eclipse IDE?
body: <p><strong>INFO: Problem occured on Ubuntu.</strong></p>
  <p>In Eclipse IDE, having a current file opened in editor, and having Project Explorer view linked to editor.</p>
  <p>I would like to <strong>navigate back from parent to parent folder in Explorer view, using keyboard only</strong>. (where each folder may have hundreds of files)</p>
  <p>Alternately, I would like to toggle (close) parent folder of selected file in Explorer view.</p>
  <p>To demonstrate with a screenshot, here is the start state:
  <a href="https://i.stack.imgur.com/Apusz.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Apusz.png" alt="enter image description here" /></a></p>
  <p>and where I want to go, parent folder selected / or closed.
  <a href="https://i.stack.imgur.com/daOCm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/daOCm.png" alt="enter image description here" /></a></p>
  <p><strong>Mouse workaround</strong></p>
  <p>As a workaround, my current workflow is use mouse to scroll up explorer until parent folder, then I close it using <kbd>-</kbd> button to its left.</p>
  <p>Because of <em>linked with editor</em> mode, Explorer view is scrolled down to current file, which makes parent folder not visible in explorer.</p>
  <p>Having to do this makes the mouse way not very effective.</p>
  <p><strong>Another keyboard workaround</strong></p>
  <p>Navigate approximatively to parent using key
  <kbd>PAGE-UP</kbd> to scroll up, but depending on files count, it is also not effective.</p>
  <p>Is there an existing keyboard, or a way to do it?</p>
  <p>Note: using Oxygen.3a Release (4.7.3a) on Ubuntu 18.04.1 LTS</p>