how to open all windows simultaneously

in safari mavericks imac?--I often have 20 or more open, lose track of some of them -cannot find the one that is playing audio to close it, etc, it is maddening and there seems to be no one else with this problem or solution-at least that i can find...makes no sense..has to be a common problem with a common easy settings fix....thanks

 

yes, thank you --I am aware of that I seem to think i want them all miniaturized on the desktop--often the option you provided does not pinpoint the one playing audio etc--only by viewing it can i tell which of the 20 or so to close etc.thank you