Don't worry about setting the resolution of 30cm×30cm×60cm 300 pixels, and don't worry about the canvas. Just send the drawings to the advertising company for inkjet printing (they know how to do it. You can also enlarge the drawings by 10 times and reduce the resolution to 100. 150, depending on the performance of your computer. The inkjet printers of advertising companies will also reduce the resolution when drawing, all of which are 35 resolutions. ) tell them about your technology and use. If you use trusses for exhibitions, you should punch holes and have clear edges, instead of using trusses to see how you fix them. Communicate with installers and advertising companies.