Plot two points on a 5 mm grid
Set the grid spacing to 5 mm and turn on axis numbers. Find O, where the axes cross. For (3, 2), count three squares right and two up. For (−2, 1), count two squares left and one up. Each square measures 5 mm on the paper and represents one coordinate unit. At 10 mm spacing, the same points take the same number of squares and occupy more space on paper.
Turning off axis numbers leaves the x and y axes and the O label in place, so you can write your own scale. The sheet comes with blank axes and grid lines. Add the points and curves by hand. For a plain square grid, use graph paper. Download the PDF and test one sheet at Actual size if you need to preserve the spacing.