Alright, so after setting decimal place to 4 in both SharePoint datatype and Infopath textbox properties, the form and the list display numbers rounded off to 4 dec places.
But the long number is still stored and shows up if displayed in an unformatted control.
That's going to be a lot of formatting, one text box at a time, in all of my views!
I think there is an expression way to limit the number of decimal place that can be entered at all. That would be a rule, easily copied into all the controls (one at a time, but still fast).
Does someone know what that rule formula is?
Thanks