I need to print a banner around 18 X 3 feet. I am going to use Adobe Photoshop.
What is the size of the image that I need to start with? By size, I mean the width, height, resolution, color mode, that I need to use so that someone who gonna print it can do his job without telling me to redo it again because I am using wrong res.
I have no experience with printed material.
Thanks in advance