Large File Associations
  On the 
   General > Editors > Large
  File Associations preference page, you can specify which editors are used to open large files. You can
  associate file extension types and file sizes to an editor. Upon opening a file with the given extension, if the file
  is above the specified size, the associated editor will be used to open the file. When multiple pairs of editor and
  file size are specified for the extension of the file, the pair with the largest matching file size applies.
 General > Editors > Large
  File Associations preference page, you can specify which editors are used to open large files. You can
  associate file extension types and file sizes to an editor. Upon opening a file with the given extension, if the file
  is above the specified size, the associated editor will be used to open the file. When multiple pairs of editor and
  file size are specified for the extension of the file, the pair with the largest matching file size applies.
  
    File types list
    
      - Add...: Adds a new file extension to the list of associated file types. In the
      resulting Add File Type dialog, type the file extension (e.g. simply "xml" or as a pattern "*.txt").
- Remove: Removes the selected file type from the list, along with all its
      associated editors and sizes.
 
  
    Associated editors list
    
      - Add...: Adds a new editor and file size to the list of editors associated with
      the file type selected above. You can choose to be asked for an editor, upon opening a large file of the selected
      type. Or, you can choose the editor with which to open the file type beforehand. When choosing an editor in
      advance (by enabling and clicking the Choose Editor link), you can choose an editor to launch either
      inside the Workbench (internal) or outside the Workbench (external); click Browse in the now open
      Editor Selection dialog to locate an editor yourself if the editor you want is not displayed in the
      list.
- Edit...: Edit the selected editor and file size for the file type selected
      above. When editting an association which specifies an editor, you can click on the editor link to change the
      associated editor.
- Remove: Removes the association between an editor, file size and the file type
      selected above.