Apps :: How to use system monitor ?

Where can I find information about the desktop system monitor ? I like it, but (1) might like to turn down the update rate a bit, (2) don't understand how the disk thing works, (3) don't need the sound thing all of the time.

Thanks !
rcs

Boot with:

dsl noicons

1) Which monitor(s)? Each one would have a different config file, and some may not have one at all.

2) arrow buttons scroll through available devices, and the screw button mounts the selected device.

3) "killall wmix"

original here.