I already spoke on this before yes.... but this one is based on A/N's or authors notes! they are better like the following..

Short as you can put it.

In a chapter so your readers are happy.

If the chapters a full a/n put A/N part 1 or 2 if its takes a while.

Remember the bold, yada yada yada.. sorry these are short it's just.. I'm bored and I have no ideas.