Interface Layout of Photoshop cs4

Menu Bar
If you look at the top of the screen you will see the Menu bar which contains all the main functions of Photoshop, such as File, Edit, Image, Layer, Select, Filter, View, Window, and Help.
Tool Bar
Most of the major tools are located in the Tool bar for easy access.
The Image
The image will appear in its own window once you open a file.
Image Name
The name of any image that you open will be at the top of the image window as shown above.
Palettes
Palettes contain functions that help you monitor and modify images. By default, palettes are stacked together in groups. These are the palettes that are usually visible: Color, Adjustments, and Layers. If none of the palettes are visible, go to Window in the Menu bar and choose palettes you need to work with.