Use them to standardize your design process and make it more efficient.
What's New: 2020
Once you activate Inventor, you can open an existing file or start a new file. Templates are available on the File menu 
New. You can choose from several templates with predefined units.
You can create a part, drawing, assembly, or presentation file using the default template or a custom template that you create. Part and assembly templates set the default units of measurement, file properties, and other defaults for models. Drawing templates set the drafting standard, drawing resources, file properties, and other defaults for drawings. Presentation templates set the file properties for assembly presentations.
Note: Assembly and presentation files are available in Inventor only.
Templates are stored in the following folders, depending on whether you have Inventor or Inventor LT:
- Microsoft Windows 7, Windows 8 and Windows 10®: C:\Users\Public\Documents\Autodesk\Inventor(version number)\Templates\Language
- Microsoft Windows 7, Windows 8® and Windows 10: C:\Users\Public\Documents\Autodesk\Inventor LT (version number)\Templates\Language
In the Templates folder, subfolders contain the templates that are listed in the Create New File dialog box. You can create and save custom templates in the Templates\Languages folder.