Tutorials
Information
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General System
Workspace
How to configure panels in KDE SC 4.1.2 (Link to kde forum entry) Equally applicable to later versions. 
Special:myLanguage/Tutorials/TweakingPlasma Tweaking Plasma 
Using with small screens (eg. Netbooks) Discusses several issues where screen space is at a premium Kimpanel Build a plasmoid for controlling input methods
File Management
Discover Dolphin 
File System Navigation 
Archive Management in Dolphin 
Transfer files from and to a server using ftp, sftp, webdav and the like
In Kontact
In Krunner
KRunner is an amazingly useful utility, launched either by Alt + F2, or by a right-click on the desktop, and selecting 'Run Command'. Now learn some of its uses Using it as a calculator Using it as an application launcher Running BASH commands in Krunner Navigating through options Using the Unit conversion plugin
In KOffice
Basic Layout is a tutorial that creates a leaflet with various images and explaining text using KWords frames technology. Several text frames and image frames will be created and positioned on the page. A Second Layout experiments with placing, grouping and moving images within a text area. A third Layout builds a page for a photo album. 
Using the Artistic Text Shape is a tutorial that shows how to get started with the artistic text shape that all KOffice applications provide. KWord Manual Tutorial on basic concepts of working in a frame-based environment, and detailed guides for all your WP needs.
In Mail Systems
In Web Browsers
In Multimedia
In Graphics
Photo Tutorial 1-1: Levels adjust Photo Tutorial 1-4: Brightness/Contrast/Gamma + Hue/Saturation/Lightness
