Operation
- Select File-> Other Saving-> Save in Join Format from the menu.

- The Save File Setting dialog is displayed.

- In the Input field, turn on Sequence File.
- Click Ref ... on the right and specify the gbk file you want to edit.
- Specify the output destination file name with full path in the Output field.
- (You can also click Ref ... and set from the file selection dialog.)
- In the Option field, turn on N Count.
- The numerical value should be about 100 to 1000
- When you click Save, all contigs will be inserted as one GenBank Format File with N bases of the number specified above inserted between them.