Macbook Air Mockup Bundle Vol 1 6719288Main Features:10 PSD FilesEditable ColorsEasy to use, Smart ObjectHigh...
How to use:
Open the file
Check for layers marked with green colors
Double Click on smart object Thumbnail
A .PSB file will be opened in the new tab
Paste your design there, close the .PSB file
Save it (Ctrl+S)
Enjoy!