«NewDoc/Insert» toggle
In the upper left corner of the DropDown List section is a button that is initially set to «NewDoc». This means that the next document you click on in your List will be inserted as a new document. (You can hover over it to see its action.) The NewDoc will be an identical copy of the original in every respect. The only way to tell that it is not not the original is to check out its name, which will be 'Document 2', 'Document 3' or the like. This prevents the possibility of an accident overwrite of the original.
You can toggle the button to «Insert» by simply clicking on it (and then back to «NewDoc»). Inserted text typically takes on the style characteristics of the receiving document