If you want to insert an Maxicode barcode in a template, then you need to insert a barcode element, where you select it as the barcode type:

The parameters are:

(The headers are links to the common description).

• Data
  The data, that you want to put into the barcode.

• Preview placeholder
  Here you can enter a text constant for the data, that you want to use for the barcode in the result view in the designer.

• Maxicode mode
  The format of the barcode. These are available:
  2: US structured Carrier message.
  3: International structured carrier message.
  4: Unformatted standard EC.
  5: Unformatted enhanced.
  6: Hardware device programming.

• Error handling
  How InterFormNG2 should react, if the data used cannot be converted into the barcode e.g. because of unsupported characters.