The specific operation is as follows:
1. Step 1: Open the photoshop software in the computer.
2. Step 2: Click the New button in the file.
3. Step 3: Set the width of 6 and the height of 9, and choose cm as the unit. The resolution can be selected according to the situation (if the picture is to be used for printing, it needs at least 3 resolution, or even higher, before it can be printed clearly. ), RGB color is selected as the color mode.
4. Click Create in the fourth step, so that the poster background is created, and you can create posters on the above layers.