Photoshop Complete Tutorials

                                   Adobe Phtoshop 7.0 Free Learning                     

When you first open Photoshop, you should have a blank working space with various menus, as in the image 1. Menus and their locations are customizable, so your screen may look different, but in general it should have a similar appearance.

Image 1

 First, take a look at the menu bar that runs horizontally across the top of the screen.

Image 2

You can create a new file, open an existing file saved on your computer, or import an image from an attached device. To open a new file, click on the first item on the menu, File You should see a pull-down menu.
                                                               Or
To see the File menu, press the Alt and F keys simultaneously, indicated by the shorthand Alt + F.

Pull-down File menu

Once the pull-down File menu is open, you can see that the first list item is New, which creates a new blank image. Click on New to bring up the corresponding dialogue box. The shortcut for opening a new image is Ctrl + N.

New Dialogue Box

This dialogue box determines the properties of the new image. You can simply press the Enter key or click the OK button to open an image with the default settings.

In the "Name" field, you can enter a name for the image. 
The next section deals with the size of the image. You can manually enter values for the width and height.

Below the width and height fields is a place to enter the desired resolution. The images you work with in Photoshop are composed of pixels, or "dots," and the resolution determines how many of these dots will be assigned per inch of the image.
Below the resolution field is a place to select the image mode. This determines the way colors are handled in the image. You have five choices: Bitmap, Grayscale, RGB Color, CMYK Color, and Lab Color.
Bitmap
Bitmap images are only in black and white. You will generally not use this mode unless you are doing an extremely simple drawing. You may wish to use it when designing a custom brush, but it isn't necessary.
Grayscale
Grayscale images range from black to white with many shades of gray in between. You may wish to use this mode if you intend to print with a black and white printer or if your image is going to be photocopied. You might also use it when scanning in images if the original itself has no color, such as an ink drawing.
RGB Color
This stands for "red green blue" and represents a mode of color selection that determines each color based on its red, green, and blue values. These are the "primary colors" of mixing wavelengths of light. RGB Color mode is used for images intended to be viewed on computer screens or for general home color printing.
CMYK Color
This stands for "cyan magenta yellow black." Each color in this mode is determined by four values for the four colors of ink used in color printers. This color mode is used by professional printing companies.
Lab Color
This is a mode in which the colors are based on the three factors of luminosity, green-red, and blue-yellow. You will probably never use this mode.
Bitmap
Bitmap images are only in black and white. You will generally not use this mode unless you are doing an extremely simple drawing. You may wish to use it when designing a custom brush, but it isn't necessary.
Grayscale
Grayscale images range from black to white with many shades of gray in between. You may wish to use this mode if you intend to print with a black and white printer or if your image is going to be photocopied. You might also use it when scanning in images if the original itself has no color, such as an ink drawing.
RGB Color
This stands for "red green blue" and represents a mode of color selection that determines each color based on its red, green, and blue values. These are the "primary colors" of mixing wavelengths of light. RGB Color mode is used for images intended to be viewed on computer screens or for general home color printing.
CMYK Color
This stands for "cyan magenta yellow black." Each color in this mode is determined by four values for the four colors of ink used in color printers. This color mode is used by professional printing companies.
Lab Color
This is a mode in which the colors are based on the three factors of luminosity, green-red, and blue-yellow. You will probably never use this mode.