As a grind master, you are assigned a simple but fun task. Adjust your hand grinder's setting to match the best result for each brew method, and then based on that click/setting, adjust your grinder up and down 9 clicks to see the difference.
The main goal is to find the settings for most used brew method, espresso, Turkish coffee, Aeropress, Moka pot, Pour-over, French press, and cold-brew. This is the most used range we use daily from 200 microns to 1600 microns.
If you use a grinder with less than 12 clicks per round, you can choose start with best setting for espresso. Let's assume the perfect setting will be 8 clicks for your grinder, take a picture of 8 clicks result, then take 6(8-2), 7 (8-1), 8, 9 (8+1), 10 (8+2) clicks.
If your grinder has more than 40 clicks per round, you can double the grind setting, let's say 24 is best for espresso, then use 20, 22, 24, 26, 28 clicks.