If you click on the inside panel edge and drag you can adjust the width of the side panels. Figure 4.19 shows the Develop panel in normal and expanded form. In this instance, a wider panel offers you more precise control when dragging the sliders. We’ll begin here with the white balance controls.
In Lightroom 4, the Basic panel settings will appear grayed out when they are set to their default settings.
You can also use the (Mac) or (PC) keyboard shortcut ...