The K Desktop Environment

4.5. Applets

Applets are small plugins that extend the pager's functionality. KDE comes with some applets but they may be provided by third parties as well. Panel applets can be started using two different ways: internal or externally. While "internal" is the preferred way to load applets, this can raise stability or security problems when you are using poorly programmed third-party applets. To address these problems, applets can be marked "trusted". You might want to configure the panel to treat trusted applets different from untrusted ones. Your options are:

For stability and security reasons, we recommend using one of the first two options and that you mark only those applets as 'trusted' that come with the KDE base packages.

To mark applets "trusted" or "untrusted" you can move them from one of the shown listboxes to the other. Just try selecting an applet in the list of trusted applets and click the >> button. This will move the selected applet to the other list, while clicking the << button will move the selected applet of the list of available applets to the list of trusted ones.