Screenbar Modules

Screenbar modules are plugins which can populate the empty area on the screen title bar with some useful information and functionality. The modules are visible on every (MUI) screen, which makes them more useful than, for example, Panel Objects which are only seen on the Ambient screen and can be left under some other windows.

Screenbar modules can be enabled and disabled from the screen depth gadget menu. The menu also contains options to arrange the order of the modules and to change their settings. The menu can be accessed by right clicking, or with a long left press, over the screen depth gadget.

Here is a list of the built-in modules and their characteristics.

Standard Modules

Clock A customizable string to show date-related values in every possible way. Double click opens the MorphOS Time preferences.
CPU Monitor A CPU load graph with task filtering options. Double click opens a big CPU load window.
Debug Opens a debug menu with the left mouse click. "Show Log..." is a useful option to check if everything has behaved OK in your system.
Drivelamps Shows activity lamps for any mass storage devices connected via IDE, SATA, USB, or SCSI. Separates reads and writes by different colors.
Eject Ejects and/or unmounts devices when clicked with the left mouse button. Ejects the CD drive if there isn't anything else to unmount, but otherwise gives an eject menu. Can unmount mounted ISO images, SMBFS mounts, Kryptos and other fileimages, USB drives, etc.
Energy Shows the battery charge on laptops. Double click opens an Energy Information window with detailed information about the battery and the current drain.
Graphicsmemory Shows the graphics memory usage. Can show the information as percentage or megabytes, and/or as a graphical gauge bar. Double click opens the GraphicBoards utility.
Memory Shows the usage of system RAM and/or graphics memory. Can show the information as percentages or megabytes, and/or as graphical gauge bars. Double click opens the Fragment utility.
Network Shows activity lamps for a network device. Double click opens the Network Statistics window with comprehensive information and graphs about the network traffic.
Thermal Monitors the temperature sensors. Can show or cycle between CPU, NorthBridge, GPU, and Trackpad sensors.
Titlebar The screen title works as a screenbar module too, although it's always enabled. Can be configured to show much more than just the original information. For example memory and battery information, contents of ENV variables, etc.
Volume Controls the audio output volume. Using the mouse wheel over the module adjusts the volume and a left mouse click opens the volume slider. The "Save mixer settings" setting defines if the volume level is saved permanently every time you change it.
Wireless Shows the wireless network status. A left mouse click scans for nearby WLANs and shows the results in a popup menu.
Run Time Modules These screenbar modules are only shown in runtime with certain programs.
Ambient SoundPlayer Shown if an audio file is played with the Ambient's internal sound player. Can be used to pause or stop (quit) the playback. Shows the filename in a text scroller.
Jukebox The Jukebox music player has two options for a screenbar module: small and wide. Both modules give a control menu when clicked with the left mouse button. Jukebox's volume setting can be adjusted with the mouse wheel over the module. The wide module has control buttons and a fully configurable text scroller.
ZVNC The ZVNC application creates a screenbar module with a popup menu for controlling it.

3rd Party Modules

3rd party modules should always be installed in the SYS:Classes/Screenbar directory. The Modules->Rescan option from the screen depth menu activates the newly installed modules without a reboot.

There's a good amount of 3rd party modules ranging from small funny gadgets to more serious and informative ones, and they can be found for example here.