I don't know what happened but all of a sudden, if I click on an effect (say black & white) and drag it to the clip I want black & white, the effect won't show in the preview. However, if I render the video and play it, it's there. I'm sure you all know how frustrating this can be for the editing process. I've already held ctrl+shft in an attempt to reset the settings and nothing has changed. Any Advice?