The Cimatron preference file would be way to big if it held the default values and options for each and every function.  But there is a way to 'teach'  Cimatron new defaults.  All defaults are set in the document template you started with, and that template can be changed.

Start a new inch or metric part.  You just used a part template!

To alter function settings, in this empty part you need to go to the function that needs changing and use it, which sets it's last used value.  Sometimes this requires construction geometry.
For example, say you want to change the default curve offset to 3mm.  Start by sketching a line.  Then use the Curves / offset function on that line.
Set the offset from 2 to 3, and OK the offset.  3mm is now the "last used" setting in offset.

From the File menu, use the 'Save as Template' function, and note the options.  You can save this file as a special template with a name of your choosing.
Which means you can have many different part templates for many different scenarios or customers.  But more common is to select the
default template button, and save the current part as your new, default mm template.

What gets saved?  Not the geometry on the screen.  You can create all the construction wireframe, surfaces, and solids you want,
but a new part will always be an empty part.  The function defaults will be saved however, as well as any sets you made, and the screen
orientation.  So if you want a new file to always be in ISO view, be in ISO view when you save the default part template.

Note that also under the File menu is the Function 'Manage Templates', which lets you view, rename, or delete the document templates.