Did you try doing any research yourself on Google?

https://www.google.com/#hl=en&tok=D8wx-mOOPc_bPiEHWBLePA&cp=20&gs_id=j&xhr=t&q=Line+6+Spider+IV+amp+settings&pf=p&sclient=psy-ab&site=&source=hp&pbx=1&oq=Line+6+Spider+IV+amp&aq=0&aqi=g4&aql=&gs_sm=&gs_upl=&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=7172379397dfe737&biw=1680&bih=883