MacOS – Expand Finder column width with keyboard shortcut

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I can expand the column width in Finder (OS X El Capitan, MacBook Pro) by clicking on the right-hand line of the column (see red arrow in screenshot). When I click this line, the column width is expanded to the width of the longest file name. How can I do the same with a keyboard shortcut?

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Best Answer

The answer to this thread pretty much points out the problem with keyboard shortcuts.

Keyboard shortcut (or permanent setting) for fitting column width to longest filename in OS X?

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