After you download and open the zip file you should notice 3 different files (license file, PSD files, website link). Open the PSD you’d like to use and follow the quick guide below.
1 – Double-click on the box of the smart object layer. You will only need to edit the layers that have (Edit this) at the end.
2 – Add your own files to the screen layer by going to File – Place Embedded.
3 – After you have added your own designs to update the main mockup just close the screen layer. You should see a popup asking if you want to save before closing. Hit Save.
That’s it 😊. The screen should change to what you’ve added.