DIMTOLJ system variable
Function Description:
The DIMTOLJ system variable is used to set vertical justification for tolerance values relative to surface dimension text.
Type : Integer 
Saved in : Drawing 
Initial value : 1(Imperial) or 0(Metric)
This system variable will not work unless the DIMTOL set to be on. The default value for DIMTOL is off.
System Variable Value:
0 : bottom 
1 : center 
2 : top