You can use this Vertical Billboard Mockup to showcase your billboard design in your portfolio in a clean and modern way. You just need to put your design in the smart layer and it is done. You can modify it according to your requirements. You need to have photoshop to edit it.
File Format: PSD
Dimensions: 2400×2000 px
Size: 7 Mb
License: Free for personal & commercial use
Author: Dribbblegraphics.com