How to set up canvas size in Photoshop for illustration and concept art. Artist tips.

How to set up canvas size in Photoshop for illustration and concept art for artist and illustrator. Basic tutorial for beginner.Q: Please can you post someday the way you set up an illustration....for example the canvas size, the layers (rough sketch, detailed line drawing, colour layer etc...) and other main things.OK, here are the step by step how to set up your illustration and concept art