You will need
  • Photoshop
  • Multiple images
Open the images which are going to work in Photoshop. To do this, use the Open command ("Open") from the File menu (File) or Ctrl+O. In the Explorer window select the desired pictures by clicking on them with the left mouse button while pressing the Ctrl key. Click the "Open"button.
Paste one image on top of another. To do this, click with the left mouse button on the window with the file that is going to be inserted on top of another image. Select the image with Ctrl+A or command All ("All") from the menu Select ("Selection").
Copy the selected image by using Ctrl+C. you Can use the Copy command ("Copy") from the Edit menu ("Edit").

Browse to the image that you want to use as the background by clicking with the left mouse button on the window with this image.
Paste the image using Ctrl+V. The same thing can be done using Past ("Paste" from the Edit menu ("Edit").
If necessary, adjust the inserted image size. To do this in the Layers palette (Layers), click the left mouse button on the layer with the pasted image and use the command Transform ("Transform"), para. Scale ("Size") from the Edit menu ("Edit"). To decrease or increase the size of the image, drag the corner appeared around the image frame. Apply the transformation by pressing Enter.
Hide unnecessary details of the image, superimposed on the background, or change the transparency of its individual sections with the layer mask. To do this, click with the left mouse button on the button Add Layer Mask ("Add layer mask"), which is located at the bottom of the palette "Layers". In the palette "Tools" which is located on the left side of the program window, select the Brush tool (Brush). Click the left mouse button on the icon of layer mask. Black paint those fragments inserted images that you want to hide. They will become transparent. In order to obtain a smooth transition from the inserted image to the background, reduce the parameter Hardness (the Rigidity) of the Brush tool. To configure the settings for the brush panel Brush ("Brush"), which is located under the main menu.
Adjust the color of the top layer, adjusting the color balance. This can be done through the Image menu, point Adjustment, sub Color Balance. Moving the sliders until you get the harmonious combination of the lower and upper layer.
Save the result using the Save command ("Save") the File menu ("File"). In order to be able to go back to editing the layers in this file, save it in PSD format.