Hi! Is this drawing or part or assembly? How did you start a new file? Please follow the steps closely.
1) Go to Project settings -> Folder Options -> Template. Then go to the template path in File Explorer to see if there are Standard template files.
2) Change the units in the Standard template files. Or, skip to next step.
3) Go to Tools -> App Options -> File -> Configure Default Templates -> select the desirable standard and unit.
A set of Standard template files should be created in your template folder.
Start a new file from File -> New -> Create a New File or click on the New button in upper left corner (Standard template is used if existed).
Many thanks!
Johnson Shiue (johnson.shiue@autodesk.com)
Software Test Engineer