Before you start adding borders make sure you have flattened your image and the background layer is locked and active.
1.Black Mount – This is great for low key and monotone images or images that dont quite fit a traditional white border, simple but effective. To Apply this border open the canvas size option under the image menu, make sure the relative colour box is ticked and select whit for the extension colour. Set the width and height to 0.1 inches and click OK. This will add a thin white border to the image. Now go back to the canvas size command and change the extension colour to back and enter 1.5 – 2 inches for both boxes and click OK.
2.Hairline Border – This is a good border for high key images (images with lots of lighter tones) as the white edges just get lost without some kind of border. For this technique go into the canvas size command and, with relative checked, set the extension colour to black and height and width to about 0.1 inches and click OK. You can also add a further 2 inches of white border to highlight the effect.
3.White Frame – This is a contemporary border that will really add that extra something to your photos. It uses the same technique as previous examples but you are adding 3 borders, the first is a 0.5 inch white canvas extension then a thin 0.1 inch black extension and to finish another 1.5 – 2 inch white extension. This adds a thin gap between the image and the border which makes the photograph stand out more. Note these canvas extensions can also be inverted to have black-white-black.