Now that we have the basics of manually positioning, scaling, and aligning UI elements with the Rect Transform and anchors, we can explore how to use automatic layouts. Automatic layouts allow you to group your UI elements so that they will position automatically in relation to each other.
There are quite a few scenarios in which you will want Unity to automatically control the layout of your UI objects. If you are generating UI items via code and a number of items may change, but you still want them to line up, scale, and position properly, you can use automatic layouts. Also, if you want perfectly spaced UI objects, automatic layouts will help you create this perfect spacing without having to do any position calculating ...
