Please describe your how can i use in legal page setting in printer sharp ar5516 problem

Go to start -> devices and printer -> select the printer -> right click on it -> select printer properties
-> choose page set up -> if you see "page set up option on it" click on it and choose the paper size
legal or anything that you want

and if you dont see page setup option where I have shown, do search for such option in
printer properties

another option is that....

when you give print from word,excel anythig you get windows to select printer, choose the printer
go to properties and all those same steps,

or

in word,excel or other application there is page setup option in file menu (in office 2007 and 10)
if is on "page layout" option.