The squares will show on the grid after you press done. Sudoku Maker 2021: Edit the list to change the numbers. Click done to preview or take a screenshot of your sudoku. Print the screenshot and solve it.
Credits: Sudoku Grid - https://www.cleanpng.com/png-the-3d-sudoku-puzzle-book-sudoku-variants-kropki-s-1507069/download-png.html @scthecool - Coding