Knowledgebase: Adobe Photoshop
How do I resize something on Photoshop?
Posted by Digital Media Services on 26 December 2012 11:59 AM
To resize an image in Photoshop:

1. Go to the "Image" menu at the top of the screen
2. Select "Image Size" from the list of options (The Image Size Dialog Box will appear)
3. Two options:
  A.  Under "Pixel Dimensions", click inside one of the boxes for either "Width" or "Height" and put in the value of the size you want the image to be.
  B.  If you are unfamiliar with pixels, you can resize according to percentage as well. Simply pull down the tab next to "pixels" and choose "percent", then put in the desired value.
Note: You only need to change the value of EITHER width or height. You do not need to do both. Once one is changed, the other will automatically adjust to the value initially put in.
4. Click "OK"

Now the image is hopefully the desired size. Picture quality is usually kept when minimizing a picture, but when it is made larger, some quality may be lost. This is important to keep in mind when resizing an image.