Now select a generic background image in and paste it above the base layer. Adjust the colour using hue and saturation until you’re happy with the contrast between your main image and the background.
Armed with a panoramic photo, use the selection and brush tools to remove the background. The trick here is to find a shot that is as wide as possible, or alternatively build one from other shots. You can add other elements to make it more interesting if you wish at this point.
Now go to Filter > Other > Offset and use the horizontal slider to get the join aligned in the centre of your document. Don’t use the vertical settings, as these will mess up your image.