Over the last year, the KDE 4 releases have suffered frequently hostile receptions. Part of that hostility was due to a widespread failure to understand that the first release was not intended for general use, and therefore was missing some of the features that KDE users took for granted. Another part seems to have been the sheer number and novelty of some of the changes. However, improvements and familiarity have taken much of the edge off the hostility, and, with last month's release of version 4.2, users finally seem to be warming to the new KDE.
All the same, KDE 4.2 is full of new design concepts and features that take a while to appreciate. Sometimes, these changes are simply a repositioning of familiar features; yet just as often, they represent a rethinking of everyday tools. Once or twice, the features even overlap or conflict with existing ones.
To help bring you up to speed, here are ten tips for understanding and working with KDE 4.2. They aren't exhaustive by any means -- but they should be enough to make you comfortable moving around KDE 4.2 so that you can discover other changes on your own.
1) Going in and out of customization display
Probably the first thing you should know about KDE 4 is that it has separate views for customizing desktop and panel options.
rest here