Photoshop Tutorial

Photoshop Tutorial
University of Chicago Computer Science Instructional Laboratory
(MacLab / linux lab)

Getting Started
Select the size of the blank document that you want to create. Pay special attention to your
choice of resolution. If you’re creating an image for the web, 72 pixels per inch will suffice.
If you’re creating a detailed art project, you want at least 300 pixels per inch, but obviously

A Few Words About Color
Computers recognized many different color formats. Some common choices include:
RGB color — lists a value between 0 and 255 for each of the Red, Green, Blue components
of a color. (0, 0, 0), the absence of color, is completely black. (255, 255, 255), the
presence of all colors, is completely white. Most Photoshop artists work in RGB.
CMYK color —lists a percentage of each of the colors (Cyan, Magenta, Yellow, blacK).
CMYK can best be thought of as the “color printer cartridge colors.” Some graphics.....



Photoshop Tutorial
University of Chicago Computer Science Instructional Laboratory
(MacLab / linux lab)

Getting Started
Select the size of the blank document that you want to create. Pay special attention to your
choice of resolution. If you’re creating an image for the web, 72 pixels per inch will suffice.
If you’re creating a detailed art project, you want at least 300 pixels per inch, but obviously

A Few Words About Color
Computers recognized many different color formats. Some common choices include:
RGB color — lists a value between 0 and 255 for each of the Red, Green, Blue components
of a color. (0, 0, 0), the absence of color, is completely black. (255, 255, 255), the
presence of all colors, is completely white. Most Photoshop artists work in RGB.
CMYK color —lists a percentage of each of the colors (Cyan, Magenta, Yellow, blacK).
CMYK can best be thought of as the “color printer cartridge colors.” Some graphics
designers choose to convert their work (after it has been done in RGB) to CMYK so
that they have a better sense of how it’s going to look after it is printed.
Grayscale —this is exactly what it sounds like. It’s a color mode that operates entirely in
black and white. Usually in order to convert an image to grayscale, you will first need
to flatten it. (More about this later)
Bitmap —Only allows for black and white dots (pixels); I wouldn’t recommend using this
Lab color — Represents color with 3 components: (Lightness, color value from red to
green, color value from blue to yellow). This is another non-standard color channel.

Saving Your File
File → Save As . . .
The default format for Photoshop files is aptly named “Photoshop Format.” Keeping your
document in Photoshop format is a good idea if you’re planning to go back and edit it later.
However, if you want to e-mail it or put it on a website, you will want to change the format
to something more universal.

more visit: http://www.maclab.cs.uchicago.edu/ and download this pdf