To focus in manual focus mode (0 Manual Focus), rotate the lens focus ring until the subject is in focus. To magnify the view in the monitor for precise focus, press the X button (0 Live View Zoom Preview).
You can also enable focus peaking, which uses colored outlines to indicate objects that are in focus. To enable focus peaking, press the i button and select an option other than Off for Peaking level (0 Using the i Button).
Previewing Focus During Live View
To temporarily select maximum aperture for an improved focus preview during live view, press the Pv button; the maximum aperture indicator (0 The Live View Display) will be displayed. To return aperture to its original value, press the button again or focus using autofocus. If the shutter-release button is pressed all the way down to take a picture during focus preview, aperture will return to the original value before the photo is taken.