This is a Project Helper.
Instead of pdf, word, doc or picture.
In the unitypackage, people usually use a pdf or .doc to tell others how to use his .unitypackage.
It is unfriendly.
Why? It is trouble and low low efficiency
Now you can use this package in your project
You can create and edit anything you want.Including label, texture and button
You can edit then with any position or width or height, color and size
And it also can jump to the line of code by a button event when you want to show some code.
On the whole, it is helpful and you can set it in all your project.