Stat > Time Series > Single Exp Smoothing > Options
Specify a customized title and the initial smoothed value.
Title: To replace the default title with your own custom title, type the desired text in this box.
Set initial smoothed value
Use average of first K observations K = : By default, if you specify a weight, Minitab uses the average of the first six observations for the initial smoothed value. You can change this default by entering a different value here. If you instructed Minitab to use an optimal weight, this option will not be available since in that case Minitab computes the initial smoothed value by backcasting.