Page 17 - CC2017_WD_Look_Inside

9. Choose White in the Background Contents menu.
If you choose White or Background Color in this menu, the new file will include a
default locked Background layer. If you choose Transparent, the new file will have
a default unlocked Layer 1.

Click a category name
to show related presets.

Click to select an Customize the canvas
existing preset size. settings in this area.

10. Click Create to create the new file.

Understanding Color Modes Theoretically, a mixture of equal parts of cyan, magenta,
The color mode (or color space) defines the structure of the colors in your file.
PHOTOSHOP FOUNDATIONS black or white; there are no shades of gray. and yellow would produce black. Pigments, however, are
Bitmap color reproduces all pixels in the image as either

not pure, so the result of mixing these colors is a muddy
Grayscale color reproduces all tones in the file as shades
brown (called hue error). To obtain vibrant colors (and so
of gray. This type of image has only one channel (you learn
elements such as type can be printed cleanly), black ink is
about color channels later in this book).
added to the three primaries. Black is represented by the
letter “K” for “key color.”
RGB creates color by combining different intensities of red,
green, and blue light (collectively referred to as the “additive
LAB color is device independent; the colors it describes
primaries”). Computer monitors and mobile devices display
color in RGB, which has a gamut or range of more than
monitor, or scanner. In theory, LAB bridges the gap between
16.7 million different colors. An RGB file has three color
the various color models; it is used in the background when
channels, one for each of the additive primaries. don’t depend upon the characteristics of a particular printer,
converting images from one color space to another.
CMYK (“process”) color is based on the absorption and The problem with using RGB for print jobs is that the RGB
reflection of light. Four process inks — cyan, magenta, colors eventually need to be converted to CMYK separations
yellow, and black (collectively referred to as the “subtractive for a commercial printing press, and many colors in the RGB
primaries”) — are used in varying combinations and model do not exist in the CMYK model. Since you’re creating
percentages to produce the range of printable colors in most this file for both print and digital media, it’s a better idea to
commercial printing. A CMYK file has four color channels, create it in the smaller color model to avoid unwanted color
one for each of the four subtractive primaries. shift later in the process.

Project 1: Composite Movie Ad 27