Adobe 65064073 User Manual page 74

PHOTOSHOP LIGHTROOM 70
User Guide
Lets you adjust certain color and tone sliders by dragging the tool in the photo. Select it in the
Targeted Adjustment
Tone Curve or HSL/Color/Grayscale panels, or choose it from the View menu. Once the tool is selected, you can
choose different targets from the Target Group pop-up menu in the toolbar.
Develop buttons below the panels (at either end of the toolbar)
Although this single-photo view is available in both the Develop and Library modules, the keyboard
Loupe View
shortcut for Loupe view in the Develop module (the D key) is different than the keyboard shortcut in the Library
module (the E key). The Loupe View button lets you quickly switch to Loupe view in each module.
These buttons let you copy or paste the current settings to a selected photo.
Copy and Paste
These buttons toggle according to whether you have one or more photos selected in the
Previous, Sync or Auto Sync
Filmstrip. If only one photo is selected, the Previous button lets you copy and paste all of the settings of the previously
selected photo to the currently selected photo on the Filmstrip. If multiple files are selected, the Sync button lets you
choose which of the current settings to paste from the currently selected photo onto the other selected photos. Auto
Sync adjusts other selected photos automatically after each slider is moved. Ctrl-click (Windows) or Command-click
(Mac OS) the Sync button to turn it into the Auto Sync button.
Toggles through four choices. You can arrange two photo views side by side or top to bottom,
Before and After Views
display the whole photo in both views, or split the photo in two.
These two buttons let you copy and paste the current settings from the After view to the Before view,
Copy Settings
and vice versa. They appear on the toolbar when you have selected the Before and After view in the Develop module.
Reading image histograms
A histogram is a representation of the number of pixels in a photo at each luminance percentage. A histogram that
stretches from the left side of the panel to the right side indicates a photo that takes full advantage of the tonal scale.
A histogram that doesn't use the full tonal range can result in a dull image that lacks contrast. A histogram with spikes
at either end indicates a photo with shadow or highlight clipping. Clipping can result in the loss of image detail.
The left side of the histogram represents pixels with 0% luminance; the right side represents 100% luminance.
A histogram is made up of three layers of color that represent the Red, Green, and Blue color channels. Gray appears
when all three channels overlap; yellow, magenta, and cyan appear when two of the RGB channels overlap (yellow
equals the Red + Green channels, magenta equals the Red + Blue channels, and cyan equals the Green + Blue
channels).
In the Develop module, the Histogram panel is a working tool. You can adjust the photo by adjusting the histogram
itself. The triangle icons in the upper left and right indicate channel clipping.