Evaluation Time
Determines the moment of the Text Field's expression evaluation.
Now - The expression is evaluated at the section fill time.
Report - The expression is evaluated when the end of the report is reached.
Page - The expression is evaluated when the end of the current page is reached
Column - The expression is evaluated when the end of the current column is reached.
Group - The expression is evaluated when the group specified by the Evaluation Group property changes.
Band - The expression is evaluated after the element's parent band has finished rendering all the other elements.
Auto - The expression is evaluated at the time that is deduced automatically by the engine. This is useful when the expression combines values evaluated at different times (e.g. percentage out of a total).