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KDE 4.0 Visual Guide: Applications

The Dolphin file manager

Dolphin is KDE4's new file manager. You can browse, locate, open, copy and move files with it. Dolphin concentrates on ease of use and replaces Konqueror's filemanagement component, which was used in KDE 3 and earlier. While Konqueror can still be used as file manager, and in fact shares the fileview functionality with Dolphin, the KDE team has decided to introduce an application that is optimized for filemanagement: Dolphin.

Copy files using Dolphin

For directories containing lots of images, press the preview button in Dolphin's toolbar and get previews of the files located in the current directory. To quickly move between directories, click on the breadcrumbs located right above the fileview. Clicking on the arrow next to one of the breadcrumbs lets you move swiftly to different subdirectories. To quickly move between directories, directly above the fileview, click on a directory name. Clicking on the arrow next to one of the directory names lets you move swiftly to different subdirectories. For a side-by-side view that makes copying files between directories easy, hit the "Split View" button. While Dolphin remembers settings for a specific directory, you can also set the defaults to your personal taste via the "Settings" | "Configure Dolphin" menu.

On the left-hand side, Dolphin's sidebar provides quick access to your most often used locations, called "Places". Just drag a folder to the sidebar and be able to quickly access it, from not only Dolphin itself, but also from the KickOff Places tab and from the "File Open" dialog of all your applications.

Show files in groups with Dolphin

The Information sidebar provides a preview with some additional information about the selected file. You can also use it to add comments to your files and tag them for easier sorting. Enable the option "View" | "Show in Groups" to group files sorted by size, type or other characteristics.

Okular and Gwenview: View your documents and images

View your images with Gwenview

Gwenview is KDE's image viewer. While it was available in KDE3, the KDE4 version has a simplified user interface, making it more suitable for quickly browsing through your collection of images. Gwenview is also used to display images. It provides a nice fullscreen interface that can be used to display your images as a slideshow.

Okular is KDE 4.0's fast and versatile document reader

Okular is KDE4's document viewer. It supports a multitude of formats, ranging from PDF files to OpenDocument files. Okular is not limited to only reading files, however. The new "Review" feature allows you to scribble annotations into documents. Press F6, choose a pen and then start marking text in your documents, add notes to them, or comment on sections. Okular is based on KPdf, KDE3's PDF viewer. Okular focuses on usability and support for a broad range of document file formats.

System Settings

System Settings is KDE 4.0's control center. Here you can change the look and feel of your applications, configure personal settings, change network settings and administer your computer.

Change the appearance the desktop in System Settings

Open "Appearance" to change the color scheme of all applications to provide more contrast, or match your personal taste better. Here you can also change the size and faces of fonts used in your applications. Although KDE 4.0 comes with well-designed and sensible default artwork, it might not fit everybody's taste. The Appearance sheets in System Settings let you easily completely change the look of the desktop.

Hardware integration through the Solid framework

System Settings also provides tools to control the underlying operating system. Solid, takes care of things such as power management, device hotplugging and network connectivity internally, and uses proven infrastructure that can be set up according to your system.


An example for an application that has seen a major overhaul for KDE 4.0 is the terminal emulation program Konsole. The configuration dialog has been made easier to use while not cutting down on Konsole's featureset. Other improvements include:

Konsole, KDE's terminal emulator

More new features in Konsole can be found in its changelog.

More applications

The release of KDE 4.0 also brings good news for users of extragear applications. Applications in the extragear modules normally take care of their own releases. From now on it is also possible to follow the main KDE Release Schedule. The release team therefore has extended its duties and will provide tarballs for applications which want to join this for every KDE release. This first set of tarballs already contain some well known extragear applications, like: Kaider, KTorrent[3], KPhotoAlbum and RSIBreak. The KDE4 port might not be complete for these applications, but they are happy to receive bug reports now.

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