You can do that from Edit > Content Aware Scale or from Image > Image Size.
image-Image Size
Dodge lighten and Burn Tool darken.
Go to Image > Image Size and type numbers or choose Percentage and type percentage in Height or Width fields at top of Image Size window.
Open Photo Shop then press CTRL+O OR click on File menu in upper left corner and choose Open from list, then navigate to folder with pictures, select the required image and Just click on Open Button. Your image will be open in Photo Shop.
You mean Color Mode? Changing how Photoshop treats and displays colors in an image.
We use retouching tools to repair or replace image pixels. For example you can use pixels from one photo or part of photo and paint them in another photograph or its part.
To create selections of your image in order to affect only those parts.
Both are software's and nothing else. Photoshop is image editing and audacity is to record and work with sound.
Adobe Photoshop is a graphics editing application popular for it's extensive amount of features. Photoshop is also, currently, the leading graphics editing application. Photo shop is also an image creation software as well as an editor. Photo shop can create any effect or style needed in a drawing or painting or layout. There are graphic software that can do specialized work faster and more efficient than Photo shop (such as painter for realistic paint effects), but Photo shop can do it all in one program. The basics of Photo shop are easy to learn, even the CS versions. They are very intuitive, and there are several ways to do almost everything to work with an individual's style of drawing and skill level yet you can spend years learning all the pro level features. Photo shop works by altering individual pixels in an image as opposed to a vector drawing program that draws with points, lines and objects mathematically. Photo shop is best with images that have complex textures, blends and photo realism, but Photo shop is also very good at vector drawing as long as the image doesn't need to be scaled and you don't need specialized CAD drawing tools
Versions of adobe photo shop?
Image processing tools (of which Adobe PhotoShop is the best known) have been widely used and it is safe to say that almost every image that is printed (outside of newspaper documentary images) has been through an image processor.
Photo Shop Pro has the features to improve the quality of photos and other images. Photo Shop Pro is great for Photographers, Graphic and Web Designers.