http://brainstorm.ubuntu.com/item/111/ It's called Quick Look, and allows you to view the contents of a file without open its default application.
This is great when you have a folder with different types of files (JPG, MPG, DOC) and you want see the content of the files quickly without open many applications (Eog, Totem, OpenOffice Writer in this case)
You can look how this work in Mac OS X on here, here and here.

[968 votes] Solution #1: Auto-generated solution of idea #111


[167 votes] Solution #2: Help the Gloobus developer


]]> en-us Thu, 28 Feb 2008 17:50:49 +0000 Tue, 24 Nov 2009 10:02:59 +0000 QAPoll module http://brainstorm.ubuntu.com/idea/111/
http://brainstorm.ubuntu.com/idea/92/
]]> Thu, 28 Feb 2008 17:56:16 +0000 Thu, 28 Feb 2008 18:20:33 +0000
Both are interesting additions.]]> Thu, 28 Feb 2008 19:03:25 +0000 Fri, 29 Feb 2008 03:08:56 +0000
I hated Konqueror because if you double clicked it will open the image than passing the command to the default image viewer.]]> Fri, 29 Feb 2008 03:26:57 +0000 Fri, 29 Feb 2008 12:13:47 +0000 Fri, 29 Feb 2008 23:18:01 +0000 I think the Ubuntu dev team should get a lot of inspiration from OSX (not stealing stuff and making it fucked up like vista of course)]]> Thu, 10 Apr 2008 22:35:57 +0000 Fri, 18 Apr 2008 19:38:37 +0000 With Quick Look you can preview text files, spreadsheets, presentations, pdf files, html files, and many more types of files.
And you can add plugins for other files that aren't supported by default.
The best of the program it's the speed, you can preview any file in one second.]]> Sat, 19 Apr 2008 02:38:53 +0000 Sat, 19 Apr 2008 03:51:55 +0000
Thanks!]]> Mon, 12 May 2008 13:15:15 +0000 I'll ask some friends for other information about this and I get back to you.
As I said, I'm not a developer, but if you need any help with other stuff (like designing graphics) please let me know,]]> Mon, 12 May 2008 14:03:05 +0000
The preview would only trigger if a user turns the scrollwheel.

Might be better than pressing a single key.]]> Wed, 21 May 2008 21:04:56 +0000
http://ubuntuforums.org/showthread.php?p=5017478#post5017478]]> Sun, 25 May 2008 13:48:39 +0000
Please take a look at:

http://launchpad.net/gloobus]]> Fri, 13 Jun 2008 16:01:25 +0000 Sun, 24 Aug 2008 16:52:33 +0000 Sun, 05 Oct 2008 11:42:24 +0000

Btw, is gloobus going to be cross platform? We should aim to give it full cross-platform capabilities, that way when windows people see it, they will be like "whoa, what ELSE is linux doing thats awesome".

]]> Wed, 22 Oct 2008 11:17:29 +0000 Sat, 01 Nov 2008 05:49:51 +0000 Mon, 19 Jan 2009 21:59:06 +0000
This is the sort of thing that would be great for Gnome 3.0. Imagine being able to strike a key in overlay mode, and bam! There it is.

Gloobus++]]> Thu, 14 May 2009 21:17:39 +0000 Wed, 16 Sep 2009 02:43:32 +0000 Mon, 16 Nov 2009 00:04:03 +0000 Very nice feature. It can be integrated with timeline(Zeitgeist), think introducing to GNOME3. GNOME3 will be context oriented, so image previewer can load previews from images from timeline.

Activities -> Show my Photos/Images.]]> Mon, 16 Nov 2009 18:36:39 +0000 ]]> Tue, 24 Nov 2009 10:02:59 +0000