The document summarizes the main techniques used to create a surrealist collage in Photoshop, including blending, cropping, selection, adjustment of contrast, brightness, black and white, levels, and curves. Key steps involved starting with two background images, cropping parts to use, applying filters to the clouds, using magnetic lasso to crop a figure and leave shoes, and eraser brush to blend colors between layers. Overall adjustments to levels, curves, contrast and brightness were made to each layer and image to create a cohesive collage.