Hi,
We can also disable the Save and Saveas and some options by following the below steps.
Go to Tools -> Form Options -> Advanced.
Open Form in design mode.
1. Open the form in design mode.
2. Go to tools -> Form options -> Open and save.
3. Uncheck the check boxes in the Enable features section.
But one thing I did not understand is how the user can design the form(Using which menu option)?