Android Studio Widget, Text Field, Large, Medium and Small Text is missing all I have is Plain which gives a Name. How can I get it and others?

Looks like AndroidStudio has undergone some change. Best option is to enter the "Text" mode and type the style yourself. For ex. if you need an equivalent of LargeText view, then add a TextView and move onto the Text mode and add this line:

android:textAppearance="@style/?android:attr/textAppearanceLarge"

Or you could also edit the properties of TextView too.

I obtained a text size same as to the "tutorial" using:

android:textAppearance="@style/TextAppearance.AppCompat.Large"

You should add this line android:textAppearance="@android:style/TextAppearance.Large" inside the TextView after clicking on the Text tab near Design tab located in the middle left to the right of design tab. but you have to consider that first of all you need to drag and drop TextView from Widgets into the user interface or Design section.