VTT provides file related options as follows:

• Open (key o)
  • Open a pure text or VTT (format) file
  • Display error message if the file does not have correct data or VTT format
  • Open the file to current VTT if the current VTT is empty
  • Open another VTT window if the current VTT is not empty
• Save (key s)
  • Save the changes to the current VTT file name
  • Add .vtt file extension if the opened file is a pure text
    VTT saves marked files with extension .vtt. Users should not modify VTT file manually. VTT files include three parts:
    • Text
    • Tags
    • Markups
    Please refer to VTT format for details.
• Save as (key a)
• Close
  • Save the changes if there are changes made since last save
  • Close the VTT Window if there are more than 1 VTT windows open
  • Close the VTT file if there is only one VTT window open
• Print (key p)
  • Provide dialog for font size auto adjustment if size is to big (> 10)
• Exit (key x)
  • Save changes if any
  • Close all VTT windows (including user documents)
  • Exit VTT

VTT also provides file I/O for tags (tag configuration file) includes:

• Import
  • Allows user to see two sets of tags with different visual effects. Please note that the tag names must be the same.
• Save
• Save as