DIMALTTZ system variable
Function Description:
The DIMALTTZ system variable is used to control zero suppression for tolerance.
Type : Integer 
Saved in : Drawing 
Initial value : 0 
Range : 0 ~ 15
System Variable Value:
0 : suppress zero feet and zero inch
1 : include zero feet and zero inch 
2 : include zero feet and suppress zero inch
3 : include zero inch and suppress zero feet
     To suppress leading or trailing zeros. Add the following values to one of the preceding values:
4 : suppress leading zero
8 : suppress trailing zero