[Add]
Overview
Adds the target file to [List of Files].
You can also add files to [List of Files] by dragging & dropping them.
Setting Procedure
1
Click [Add].
The file selection screen is displayed.
2
Select a file, and click [Open].
The file is added to [List of Files].
in the upper-right of a page, it turns into 
and is registered as a bookmark.