PHOTOSHOP in how to enlarge the picture

I am a beginner ah, PHOTOSHOP in the enlarged picture of how the trouble to tell who is under

Ctrl + and the combination of keys.There are a tool Click on the magnifying glass ah Dacron in the lower right corner you can be 100%.Enlarge what? Alt + I, I

you want to enter as the number or size, you can choose to scaling up and designated to enlarge.Is not on the right side There are many windows you, there is the top, below a small triangular gap can be, enlarge photos, photoshop in the most simple tools:cut (toolbox on the left side of the third instrument)
click on the “Crop” tool , In the menu bar at the bottom there will be cut to the specific requirements, width, height, to write directly on the number on the line, the default unit is cm.
Behind the resolution refers to the fineness of the picture, in general, with 200 photos 300, and other pictures do not ask for much in the 200 the following