Testing image editing actions
Note, that you can test every action on the sample image before applying them to your images at file list. Every action can be tested separately and with other actions added to an action set.
Open your sample image, add any action to the "Action set" and choose the "Immediate preview" option at the bottom of the "Action settings" area to see how this value will affect your image. If you have already made the "Action set" you can try all actions by clicking the "Test action set" button. To return to the initial image look use "Undo all" or "Undo" button to take off the last applied action.