Open your image File > Open and browse to your file

Cropping, using the crop tool
If you require a thumbnail or web specific sized image, best practise would be to use the Crop Tool.

Set the size in pixels that you would like your final image to be  using the toolbar at the top of the photoshop page. Be sure to update the images intended resolution, for web you would usually choose 72 pixels/inch.

Example, I chose 150 px X 150 px

Next, go to your image, left click (hold) and drag your cursor over the section of the image you require.

Double click on the highlighted area and the image will be resized to you new proportions.

Cropping using the marquee tool – re framing

Select the Marquee tool from the toolbar.

Go to your image and again, left click (hold) and drag the curser over the section of the image you would like to keep.

Once you have selected the area, choose Image > Crop and the image shall be cropped to your chosen selection. If it is still the wrong dimensions see below.

Resizing the image
If your image is correctly framed and the proportions are correct simply resize the image.
Click Image > Image Size

Make sure you check the box Constrain Proportions otherwise you will distort your image.

Tutorial requested by Jane Bassett of www.2xs.co.uk Windsurf and Kitesurf online shop.