Just a tip from what I've learned by setting it as 1, 2, 3... before in the process of learning.
If you're not doing it already, go by 5s, 10s, 100s, or 1000s in everything when configuring display order so if you need to come back and insert B between A and C, you don't need to change the display order of 24 other items. Instead insert it as 5 (if going by 10s) to allow A-2 be before B if needed by a display of 3 (supposing A is 1).