Hi FBM,
You just need to adjust your settings in the tools options menu.
Goto;-
Tools - Options
In the left hand menu tree select Parameters and Measure under the General branch.
The right hand tab window section has a number of tab icons scroll across to the final tab entitled Units. The last entry on the window is;-
Decimal places fro read/write numbers and adust the value to the required amount.
Note 8 D.P. ensures that values cut and paste between entry fields without losing any accuracy.
Gary W.