You can select or deselect entries in the Predictors list by clicking them. The selected (highlighted) predictor effect is acted on by the Delete and Edit buttons. Double-clicking on a predictor in the list invokes an appropriate edit action for that predictor.
If you right-click an entry in the Predictors list, the system displays the following menu of actions that encompass the features of the Add, Delete, and Edit buttons.
Add Linear Trend adds a Linear Trend item to the Predictors list.
Add Trend Curve opens a menu of different time trend curves and adds the curve you select to the Predictors list. Certain trend curve specifications also set the Transformation field.
Add Regressors opens the Regressors Selection window to enable you to select other series in the input data set as regressors to predict the dependent series and add them to the Predictors list.
Add Adjustments opens the Adjustments Selection window to enable you to select other series in the input data set for use as adjustments to the forecasts and add them to the Predictors list.
Add Dynamic Regressor opens the Dynamic Regressor Selection window to enable you to select a series in the input data set as a predictor of the dependent series and also specify a transfer function model for the effect of the predictor series.
Add Interventions opens the Interventions for Series window to enable you to define and select intervention effects and add them to the Predictors list.
Add Seasonal Dummies adds a Seasonal Dummies predictor item to the Predictors list.
Edit Predictor edits the selected (highlighted) entry in the Predictors list.
Delete Predictors deletes the selected (highlighted) entry from the Predictors list.