What's Expand Templates Widget Templates and where's it?

Expand Templates Widget is a thing that we need to do something like if we're finding something inside and you just click it then it'll become more words,some of it will be using as original means without clicking the Expand Templates Widgets but some of it will be using Expand Templates Widget and its NOT USUALLY okay,but if you wanna edit somthing by Expand Templates Widget,for BEGINNERS you should know how...
Okay let's start it...

Click it to pop out and see.

So its just easy,beginners and its easy to find!!So that's it!