Just like in many other applications, you can reuse elements you are editing with the well-known copy and paste operations. To copy an annotation do the following:
Select the annotation
Right click on it and select , select the same option in the Annotation drop-down menu or press CTRL+C
It is possible to customize what is placed to the clipboard when copying an
          annotation in the the section called “Editing preferences” window
            (Editing panel, bullet point 9). This is especially relevant when
          pasting annotations in other applications than ELAN. It is e.g. possible to copy the
          annotation value only or to copy a citation form that includes the media file name and
          tier name etc.