Creating a billboard
Hi I just wanted to ask how large canvas should I make when I'm creating a billboard which is gonna be 240cm tall and 510cm wide after printing. Because if I write down these proportions in photoshop and choose 300dpi for resolution I get megaultra large canvas something like 60k * 28k pixels. So question is by how many times can I make it smaller in order to maintain nice look after printing.
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