To apply an effect to an image click on the effect icon from the Effect toolbar at the top of the image editor screen. Click here for a list of effects.

After selecting an effect the right side of the screen will show the effect settings. If an effect supports Stencils then the Stencils toolbar will appear on the top right. Stencils allow effects to be applied to the underlying layers using interesting shapes such as Star, Rounded Rectangle, Ellipse and the conventional Rectangle. Instructions for each effect are displayed on the bottom right of the screen.

Stencils and some effects that do not support Stencils (such as Region of Interest) use Selection Rectangles. Draw a selection rectangle by clicking and holding down the left mouse button, drag the mouse and release the left button to draw a rectangle. Once a rectangle is drawn it can be moved, stretched and generally resized. If the current effect supports Selection Rectangles modify the selection to apply the effect to the desired area.

Right-clicking in a Selection Rectangle will display a menu of various alignment, sizing, and centering services to help manipulate the rectangles.

When done working with an Effect click Apply to save the changes and continue with another effect. Click Cancel to discard this effect.

When not editing an effect the Image Effects list will display. It is possible to re-order the application of effects by dragging and dropping items in the list. The only limitation is that an effect may not be dragged before or after another effect that shows a padlock image (effects that alter the shape or size of the image show padlocks).

To edit the settings for an effect, including the Stencil and Selection Rectangle, simply select the effect from the Image Effects list and click Edit (or double-click).

Delete an effect by selecting it and clicking Delete. When an effect is deleted in this way it can be Restored (Undeleted). Deleting and Restoring can be a useful way to see the effect of an effect in a heavily layered modification.