We currently support both Kabat and IMGT numbering scheme along with a Standard amino acid sequence numbering.
To have your antibody numbered, you will have to run your sequence(s) with the Scaffold annotator. You can learn more about how to set up a Scaffold annotator analysis in the following article. The default numbering scheme is set to Standard, to change this, select your preferred scheme in the Numbering Scheme drop-down within the Scaffold annotator popup.
Note that we currently only support Kabat and IMGT numbering for the Scaffold annotator.