Sometimes when I am using the direct manipulation icon to make changes to effects by using the handles in the monitor I do not get an accurate view making it difficult to use the direct manipulation feature.
i.e. I try and put a garbage matte around a face but when I preview it is actually not on the face but another part of the image even though it looked right during direct manipulation.
Hopefully I am explaining this well enough.
Anyway what causes this this occur and is there a way to prevent it.