1 in the matrox effect setup dialog box, click the tab or track where you want to create your keyframe.
2 move the positioner to the frame in your clip where you want the settings to take place.
press the home key to move the positioner to the first frame of your clip.
3 use the effect controls in the dialog box to set up your effect. as soon as you adjust a control, a keyframe is created on the corresponding track, behind the positioner:
you can create a keyframe with default settings by pressing ctrl+insert or by clicking the apply default settings button on the toolbar. you can also create a keyframe with the currently displayed settings by pressing insert or by clicking the apply current settings button on the toolbar.