@tomleslie Thanks for your update.
The use of menu Format->Numeric Formatting window, and then hitting the "Apply and set as default" also make the format apply to all the subsequent calculations in my system. However, to apply this to all calculations in a worksheet, I have to select all (Ctrl-A) and then apply the format using the GUI menu.
Is there any way to give this formatting control through a statement, so I can change the presentation through out the worksheet, similar to interface(displayprecision=4) ?
It appears to me that the mix of using a GUI menu Format->Numeric Formatting, that apply attributes to the worksheet lines, is the wrong approach in worksheet mode, where a statement similar to interface(displayprecision=4) should be used instead.
With respect to Digits, then I don't want to limit the internal calculation precision; the purpose is only to present results with a precision that matches the input data precision.