New displays the Create New Files dialog box, where you select a template for a new file. A tab displays for the subfolder you select in the Templates folder. You can add subfolders in the Templates folder, and then add template files to them.
When you install Autodesk Inventor, the Standard.file type files are created and placed in the default folder, based on your selection of default units of measurement. To make any template the default template for a new file, save it in the Templates folder with the file name standard.ipt, standard.iam, standard.idw, or standard.dwg. To avoid overwriting the existing default template, move or rename the existing standard template before you save the new template.
Standard AutoCAD Mechanical templates are installed by default to the English and Metric folder. Each standard AutoCAD Mechanical template name begins with am_, following by the standard type. To make an AutoCAD Mechanical template available in the default folder, save it in the Templates folder with the file name standard.idw or standard.dwg.