When you modify a parameter in a property dialog box, Automatically applies changes you make to a property window or dialog box. Harmony applies the modification automatically and displays the result in the Camera view. When working on a heavy scene, it is useful to turn off this option.If you want to always work in Auto-Apply mode, you can deselect the Auto-Apply option in the Preferences dialog box (General tab). Then, each time you start Harmony, the Auto-Apply mode will be off. You must click the Apply button to see any modifications.
When you disable this function, Apply and OK buttons at added at the bottom of the Layer Properties view and any other parameter dialog boxes.
Click Apply to apply the current change.
Click OK to apply the current change and close the Layer Properties.