Hope this helps! (My notes)
The use of Pan and Zoom uses Key Frames to set each ¡§stage¡¨ of the movement. When you enter (by clicking on Customise) you are at the first Key Frame. (The ¡§active¡¨ Key Frame is shown by the red coloured diamond shape on the slider). Set the size and position of your start point by using the handles (to Zoom) and the red crosshair (to position). Drag the jog shuttle to an intermediate position (say 1/3rd across). Click on the +arrow on the Key Frame slider and a red marker should appear at this position on the slider. Use the handles and drag the red crosshair to the position you want for the image (i.e. to centre the zoomed image). Drag the jog shuttle to a new position (e.g. 2/3rd across) and again click the +arrow on the Key Frame slider. If you want the position and/or zoom of the image to be different, use the handles and red crosshair to place it. Alternatively, if all you want is the image to stay still between the two Key Frames to give the effect of a pause go back to the previous red marker and right-click on it, click ¡§Copy¡¨. Then go forward to where you last placed a Key Frame, right-click and click ¡§Paste¡¨. The image will stay constant between the two frames. Then click on the last red marker and adjust your final Zoom and position using the handles. Press -> for a ¡§Preview¡¨ (before you press this you can reposition the whole window (dragging the blue top margin) so that you can see the large Preview Window as well (this is not really necessary, but it gives a larger screen size). Preview your finished Pan and Zoom and if you are satisfied click ¡§OK¡¨. The Customised overlay animation will be added. In the large Preview window you can now position the finished Overlay e.g. in the top left hand corner of the screen to give a reminder effect. A Border can be added if required. I often use thickness 1 or 2, with a white border.
Finally, if you want to you can add Fade In/Out effects, by clicking on the signs that look like volume controls.
With Still Images, the overlay shows up in the Preview window, centred in the window. Handles allow you to drag it to size and position (using the handles at the corners keeps the aspect ratio correct). Right clicking on the overlay in this window displays another menu allowing you to ¡§fit to screen¡¨ etc for use on the TimeLine. Using the Fade In/Out buttons (look like Volume fade buttons) controls the fade in/out effect for more professional effect.
The so-called ¡§Ken Burns¡¨ effect is merely a use of the Pan and Zoom effect where Key Frames can be used on an Image to give the effect of starting on one spot in the Image and controlling the movement over the Image to finish in a different spot. This can be used, for example, with an image of a group photo, to start with one individual in the group and scan over others, using Key Frames to pause over intermediate individuals as required, and finishing up at the last individual. The Image clip can be stretched so that sufficient ¡§pauses¡¨ can be accommodated, but this might add to the complexity of Key Frame markers on the slider bar. Alternatively, the Image clip can be duplicated as often as necessary, and successive (identical) clips used for small parts of scans to ease this complexity, and the successive clips can be butted up against one another. (This will only be necessary for large groups and shouldn¡¦t be needed often).
The ¡§Ken Burns¡¨ effect gives the impression of animation to a Still Image.