Step 1: Selecting the Image
Step 1: Selecting the Image
Note: If you're cutting your paper smaller than 12" by 12" you're doing something wrong.
If you wish to learn how the math works and calculate the dimensions of the paper manually instead of using Photopea, you can watch this video. Advanced artists should learn this as you may not always have a computer to where you can use Photopea.
If you would like to learn how to create your own grid on a drawing then you can watch this video.
If you would rather get a printout of your source image and fold it to create the grid, you can watch this video.