Resizing
You don't necessarily have to crop an image to resize it. That's just an added plus if you were planning on cropping the image anyway. If you wish to resize your image without cropping, Photoshop offers a number of methods.

Resizing to a Specific Size

To resize your image to a preset size, follow the steps below:
  • First Create a new file ctrl+N or go to File > New.
  • Set the document parameters that you need. For example, I set the following values: a document 1000 x 1500 px, 72 pixels/inch, RGB Color Mode, 8 bit, White Background

  • Press Save Preset and you will see the New Document Preset dialog box. The program offers us to save the preset as "1000px * 1500px".change dialog boxname as you like and press Ok to save the preset.

  • Next time you need the document of this size, just call the command File > New and in the Preset fall-out menu in the New Document dialog box select the "1000px x 1500px" preset.

Digital Photos Resizing

Digital photos usually have large dimensions but low resolution, 72 px, which effects their quality when their size is decreased or increased. When printed, the photos with the changed size will look pixilated. To resize the digital photos without loosing the quality, follow these steps:
  • Open the digital photo you wish to resize.
  • In the main menu,Press Ctrl+Alt+I or go to Image > Image Size.
  • In the Image Size dialog box, check the Resample Image box off. Type in your desired resolution (72 px good for web images or 300 px high quality prints, ).



Enlarging

This tutorial is to help you learn how to blow-up or enlarge a picture.
  • First Open the digital image you wish to enlarge
  • In the main menu,Press Ctrl+Alt+I or go to Image > Image Size.
  • In the Image Size dialogue box make sure the Constrain Proportions Option is checked.


  • Then simply adjust the photo size with by the width or the height by entering a larger number. After you enter a new size press OK.