Comment 58 for bug 681348

now ctrl+tab(soon to be alt+tab) also have a show desktop option, if it matters.

2011/7/30 Treviño (Marco Trevisan) <mail@3v1n0.net>:
> I was thinking to add a middle click support to the Viewport switcher
> icon. If middle clicked (and maybe long-pressed, for touch-devices) it
> would show the desktop.
>
> --
> You received this bug notification because you are subscribed to unity
> in Ubuntu.
> https://bugs.launchpad.net/bugs/681348
>
> Title:
>  Add "show me the desktop" keyboard or Unity dock shortcut
>
> Status in Ayatana Design:
>  Confirmed
> Status in Unity:
>  Confirmed
> Status in “unity” package in Ubuntu:
>  Confirmed
>
> Bug description:
>  Keyboard shortcut to minimise all windows required.
>
>  Description:
>
>  Ubuntu used to have a button on the bottom left corner of the screen
>  that minimised all windows.  This button was equivalent to a button
>  that used to exist in MS Windows prior to the advent of Vista/Windows
>  7.  In Unity this button has been removed, however a 'minimise all'
>  function is still useful to allow users to go directly to their
>  desktop.
>
>  Competitive analysis:
>
>  Minimise all windows functionality in other operating systems.
>
>  Windows 2000 & Windows XP: Button on desktop and "Windows Logo+D" key combination
>  Window 7: "Windows Logo + D" key combination only
>  OSX: "Option-Command-M" Key combination only
>
>  Change request:
>
>  1) Implement a "Super+D" keyboard shortcut to minimise all windows.
>
>  2) Create a small application that when clicked minimises all windows.
>  Users who would like a 'minimise all windows' button can then add this
>  application to their launcher.
>
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>