The \title{} and \subtitle{} commands are to be used to define the title (and a subtitle, if necessary) for your article. If your manuscript uses multiple TeX files then make sure that only one TeX file should contain the \documentclass[
The \title{} and \subtitle{} commands are to be used to define the title (and a subtitle, if necessary) for your article. If your manuscript uses multiple TeX files then make sure that only one TeX file should contain the \documentclass[