The easiest way to modify an applied filter is to adjust its parameter controls in the Filters Inspector or in the HUD.
Select an applied filter in the Layers list or Timeline.
Open the Inspector, then click Filters.
The Filters Inspector appears, showing parameter controls for the currently selected filter (and for any other filters applied to the parent layer or group).
Adjust the parameter controls to modify the filter.
For a complete list of parameter controls in each filter, see Filter types overview.
Select a filter in the Layers list or Timeline.
In the toolbar, click the HUD button.
The HUD appears, containing a subset of parameter controls for the currently selected filter. (To access all of a filter’s parameter controls, use the Filters Inspector.)
Adjust the parameter controls to modify the filter.
For a complete list of parameter controls in each filter, see Filter types overview.