what is opposite sign in nav and where & when this will use?

Pls help me regarding opposite sign in nav iam very confused.

Are you referring about the (-) negative sign?

yes sir

The Subtraction / Negation sign (-) can be used :

  1. As Binary Operator Eg : “Unit-Amount Rounding Precision” := GLSetup.“Unit-Amount Rounding Precision”
  2. To calculate Time Difference. Eg : TotalTime = Endtime - Startime

i am finance user not developer pls mention its use in finance entry and report