DOC: new transformation option to be done
DOC: new transformation option to be done

Former-commit-id: 56681713ae5f1b33179e0a44b6b6166b458473c0
Former-commit-id: 937f74854f02a3dc6d6a7833fad4d3764e9500ff
3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox,3324fr/spinalcordtoolbox