When ever you want to demonstrate that your app or website works on multiple platforms you have to provide images to prove that, but you might not be able to do that because you don't have these devices, so you need to fake these images, In this insturctable I'm going to show you a quick and easy way to do this in just 2 minutes !
Step 1: Open Original Image Containing a Monitor or Screen
Open original image of a monitor or screen in Photoshop.
Step 2: Open the Image You Want to Put on the Screen
Open the image you want to replace the original screen with, it should have the same aspect ratio as the monitor shown in the original image.
Step 3: Drag the Background Layer to the Original Image
First, unlock the layer "Background" by clicking on the lock icon next to layer name, the name should change automatically to layer 0
Then, drag the layer to the original image tab in Photoshop.
Tip: you can just drag the image directly from it's location(e.g Desktop) to Photoshop window to import it as layer in
the opened image(In this case the original image containing a monitor)
Step 4: Edit the Image Prespective to Match Screen
You can use perspective warp but in this case I prefer using normal editing in scale/rotation mode, to do this you need to hold down "Ctrl" while dragging image corners and zoom in to match the screen corners.
Step 5: Done!
Use "I made it" button, celebrate by commenting your final image!