Yesterday I was on a - let's say - workshop. Somehow we were talking about our hometowns and instead of I spelled mine, I wrote to the whiteboard, somehow like this:

My handwriting is not the nicest, so the "teacher" asked me about 2 letters, what are those exactly. I told him and he did this:

I've never seen this before. He could do something like this:

We can say it's not a big deal, but he did not correct or touch my work, just shown a better way.

It really makes difference.

Show the better example, but don't try to "fix" or "correct" the other people or their work. Show how could it be better and next time maybe they follow you.