If you are printing your images then you might want to make them fit a frame or if you want to display the image on a website or screen. Resizing your images will allow you to make them a specific size.
First thing you will need to do is open your image which can be done via File > Open and then browsing for your image. Shortcut key for this is Ctrl + O.
Once you have your image simple click Image > Image Size. The shortcut key for this is Alt + Ctrl + I.
A window will pop up which will allow you to resize your image. From here you just enter the dimensions you want your image to be.
Note: The default option for the aspect ratio is locked. If your image is not a standard aspect ratio you will need to unlock this.
Adobe has kindly provided some preset which you can access by pressing Fit To:
If there is a preset that works for you then select it, press OK and that will resize the image to your desired size.
You also have the option to create your own preset if you use a specific size you want to be able to select quickly.
If the presets don’t have the size you need then below that you will find Width and Height and then drop downs for both these option. The default selected is pixels which is mainly used when resizing for screens but if you want to resize for prints you have Inches, Centimeters and Millimeters. In this quick guide Resolution and Resample can be left on their default settings.
From the drop down select the resize measurement, enter the size you want in width and height and then press OK. This will now resize the image to the size you set.