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Openbox is a highly configurable, minimalist window manager. It is the window manager used by LXDE but can also be run separately from LXDE.
Figure 5.9a provides a screenshot of Openbox running on a PC-BSD system. The application menu was launched by right-clicking on an area of the desktop.
Figure 5.9a: Openbox on a PC-BSD System
The application menu contains an entry for the Openbox Configuration Manager which can be used to customize settings such as themes, appearance, mouse, and margins. A screenshot of this configuration utility is shown in Figure 5.8b.
Figure 5.8b: Openbox Configuration Manager
A list of websites containing additional themes is available from the Openbox wiki.