Is there a way with multiple monitors to snap all windows to one side?

[coocooforcocoap]

Hi all, the power keeps dropping here all the time and to save on UPS time i turn one monitor off to save power, but i would like a way to snap all windows to the mbp laptop screen before i do, preferably with a single keystroke. Any ideas?

 

[liketom]

screen spanning button up there on them Function keys

 

[coocooforcocoap]

screen spanning button up there on them Function keys

Ha! who woulda ever thought it could be so simple. thx.