[2020] How to edit console commands?

Have you tried Creative Mode? It’s like what you want, but through a graphical user interface instead of through the console. Enable it with cm in console, then close the console and press u.

Either way. I just tried it, and I was able to turn on creative mode by typing cm in console, even on a game with Cheat Mode turned off. So turning Cheat Mode on in the settings does the same thing.