Numeric edit fields in STATISTICA dialog boxes contain smart microscrolls that enable you to increase or decrease the value in the edit field incrementally, by either the last digit (click on the microscroll with the left-mouse button, e.g., 1.11, 1.12, 1.13, ...) or the last digit by a factor of 10 (click on the microscroll with the right-mouse button, e.g., 1.11, 1.21, 1.31, ...).