This is the first lesson of Adobe Photoshop

PRIMARY SETTING OF IMAGE
This is the first lesson of Adobe Photoshop 5.5. In this lesson we will cover primary setting of work area .
When we start working on a new project, first we set size, background color and color mode for an image.
PRIMARY SETTING
From "File Menu" choose "New" to open the following dialogue box:
Enter desired values for your new project.
Name : Type a name to identify your image/drawing Width : Horizontal dimension of image (Use can select a unit by clicking triangle marked "A") Height : Vertical dimension of image Mode : Standard color mode is "RGB".RGB stands for red, green, blue. Contents : Select a background color for your image. (1) White : White background color (2) Background Color : Current color as fill (3) Transparent : No Background Color (When you choose "transparent" your canvas will show you gray and white squares but they will not appear in your final image because they are like a graph only).
When you set all the parameters click "OK".As you click "OK", a canvas of your required size will appear as shown below:
Click circled area to maximize the canvas. DRAWING TOOLBAR