The Editor permission

Hi,

I have been using Appian for last 6 months, I'm beginner.

Through my learning path for Appian Developer I have decsoverd confusion in online course 23.1 Exercise 3: Manage Users and Groups.

On page 5 in exercise 3 under note it says that Editor permission level allows users to delete documents, but documentation on your site says that user must have Administrator permission to the document and its folder in order to delete it.

Please help me understand.