First make sure the focus selector ( manual p.7, #8 isn't locked on the L. If it is not locked ( should be to the 'dot'), you move it with the multi selector. You may have to give the shutter a half press to make it active.To center you can just hit the center button ( #7)but you can also move it around using the directional arrows on the multi selector. How far it moves at each click will depend on how many focus points you have selected (custom setting menu ( pencil icon)-> a Autofocus->a8 AF point selection-> pick your number press ok. I choose 51 .I just prefer it so I can fine tune my composition when using spot metering and/or autofocus.The focus and recompose always seems to take my focus off a little.. I also choose wrap around in case I get trigger finger ( thumb) and my focus point goes to far..