The Transform salary dialog allows you to tweak the calculated salary (#THIS) or bypass many of the Salary Definition's parameters and write your own expression to determine salaries for each measurement period.  You may choose to transform salaries For all measurement periods and/or just provide an Alternative for decrement and beyond by checking the respective Transformation expression: box(s).  By default, entering an expression For all measurement periods will control the salaries for all measurement period beginning with the measurement period containing hire date. By default the salary transformation for decrement and beyond is the same as the hire date salary transformation unless you choose to override it by checking the transformation expression box for Alternative for decrement and beyond.

In both cases, the expression box allows you to use Data Dictionary fields (including the fields chosen in the Salary History selected for this definition) and ProAdmin built-in operators (including #THIS and #DATE operators), to determine measurement period salaries.

#THIS, and the expected result of the transformation, is the accumulated salary at each calculation date within each measurement period. In special cases when the measurement period has the same periodicity as the data fields in the Salary History, #THIS is the value in the field (or the sum of the values in the fields - such as regular pay and overtime pay - with the same dates).

See Expression Operators, or press F1 from within the box, for details about the operators available, which range from simple arithmetic to specialized measurement period and date arithmetic operators. In the context of this salary transformation option, #THIS represents the salary after almost all of the Salary Definition parameters (including any salary projections, if an Estimate Calculation) have been applied to the salary fields selected in the Salary History Definition. If you need to adjust any dates in your expressions, you may find the date adjustments described in Date Rounding in Expressions useful. See Projecting flat bonuses and increasing salaries for an example of a salary transformation expression, and Transformation Expression Details for information about checking transformation results.