The first question you must ask yourself when making a new file in Inventor is, do you want to use the Default Template assigned to your file type, or do you want to select a Specific Template?
NOTES:
Neither answer is right or wrong. It depends on the company and what you’re designing.
If you do many different types of designs for many customers, it’s likely that you have multiple templates to use in different circumstances, in which case you should select the specific template appropriate.
If you do things primarily in house, in the same standard, using the same units, it’s likely that the default template is purpose built by your CAD Admin and you can use the default template.
REFERENCES:
To help you understand these concepts better, view the how-to videos on:
New File Video