Split/Merge
Ctrl+F10

 This command splits a file into a number of segments. The same
 command merges the segments into a file.

 Splitting a file

  You can specify the size of the segments - when you press
  Enter the number of segments is automatically calculated.
  Alternatively, you can specify the number of segments, and the
  size of each segment is automatically calculated.

  Check the Delete file after split option to specify that the
  original file is deleted when the segments are created.

 Merging files

  Select the files you want to merge and press Ctrl+F10.
  Specify the path and a filename for your new file. The
  default is the name of the split files without an extension.

  Check the Delete Split segments after merge option to specify
  that the segments are deleted when the new file is created.