If you do not need left alignment during output, specify no to give better performance and to reduce the code size.
Left alignment strips leading spaces and places them at the end of the field.
If you have reason to regenerate your text forms and want to retain the field characteristics that were in effect in EGL versions before mid 2012, set the following symbolic parameters to NO: ALLOWTUILEFTALIGN, ALLOWTUISETFORMITEMFULL, and ALLOWTUIFILLWITHNULLS.