Adobe Photoshop CS

Photoshop is a powerful image editing software. It is resolution dependent and we can export Photoshop file into different format for e.g.: For video, Web, Print etc, we can create 2D, 3D graphics for web, also we can animate some graphics for web using Photoshop & Image Ready.
The default file extension of Photoshop is "PSD". In Photoshop the most important thing is a layer. You can create as many layers as you need. To open layer press F7 or Go to Window > Layer.
When you open Photoshop, you will see different Menus, Option Menu, Tool Box, and Floating Palette.
Go to File Menu > New or Simply press Ctrl + N to open New Photoshop Document.
The Default Photoshop colour Mode is RGB.

Resolution :- Resolution is the output Quality of any image (picture). Higher the resolution increase file size & you will get best quality picture. Lower the resolution decrease file size but you will not get best quality picture.

Pixel :- Pixel are a tiny dots which contains colour value & colour location.

To fill Foreground colour Press Alt + Backspace.
To fill Background colour Press Ctrl + Backspace.
To Deselect Marquee Selection Press Ctrl + D
Unto :- Ctrl + Shift + Z