I'm using Synaptic and Ubuntu, and when installing something it gives a tree view widget. ("To be removed", "Unchanged") where you can expand items by pressing on the + icon.

My question: How can I expand these items with the keyboard? On Windows, Right would work, but here it doesn't work.


Use Shift + Right to expand and Shift + Left to contract.


Can't try it right now, but maybe:

  • tab to cycle the focus between the widgets and select the tree;

  • up / down to select the tree items;

  • space to expand/contract the tree items.

  • <kbd>Space</kbd> doesn't work.
    – Ram Rachum
    Sep 22 '10 at 11:53

The keys + and - work in most tree view widgets (regardless of OS) for expand and collapse, respectively.

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