When you come to writing a document, there are two ways to insert a citation from EndNote. The first of these, is to use the EndNote plugin in your word processor. 

Method 1

1. Click on the EndNote tab in Word. 
2. Select the Insert Citation icon. This opens the Find & Insert My References dialog.
3. Search for the reference you wish to insert. This could be a title, author, or keyword. Select Find. 
4. Select the reference you wish to insert. If you wish to select multiple references, hold down CTRL or Cmd. 
5. Click on Insert or use one of the drop-down menu options below the Insert button.

The second way to insert references is from within the EndNote program itself. 

Method 2

1. In Word, place your cursor where you wish the citation to appear. 
2. Open your EndNote 20 library and browse or search for the reference you wish to insert. Select any reference to be inserted.
3. Insert the citation by clicking Tools > Cite While You Write > Insert Selected Citations(s).

Tip: You will not be able to edit references in Word as the contents of these fields are controlled by the EndNote 20 program. If you need to edit a reference, return to EndNote, edit the reference there, and then click on Update citations and bibliography in Word.