Found on the lower-left corner of the Nikon D3300 back, the i button activates a control strip that gives you quick access to some critical shooting settings. Here’s how to use the control strip for viewfinder photography:
Display the Information screen.
You can do so by pressing the Info button.
Press thei button.
The top part of the display dims, and the two rows of settings at the bottom of the screen — which is collectively referred to as the control strip — become accessible, as shown on the left in the figure.
The currently selected setting appears highlighted, and its name is displayed at the bottom of the screen. For example, in the left screen in the figure, the AF-area mode option is selected. Options that are dimmed in the control strip aren’t available in the current exposure mode (Auto, P, Effects, and so on).
Press the i button to activate the control strip (left); highlight the option you want to adjust and press OK to display the available settings (right).Use the Multi Selector to highlight the setting you want to change.
Press OK.
A screen displays the available settings for the option, as shown on the right side of the figure.
Use the Multi Selector to highlight the desired option, and press OK.
You’re returned to the control strip. You can then adjust another setting, if needed.
To exit the control strip, press thei button again.
Or just give the shutter button a quick half-press and release it. The Information display returns to its normal appearance.
In Live View mode, the control strip appears in the middle of the live preview, but everything else works as just described.