To change the image on an image button:
You can replace the default image on a slideshow button with a single photo or a movie clip.
Drag a photo or movie clip from the Media pane to the button until you see the green circle with the plus sign. The photo or movie clip is displayed on the button and is also added to the slideshow. When you double-click the thumbnail portion of a slideshow button, an image slider (shown below) appears above the button. You can move the slider to select a different image to display on the button.
To add the photo or movie clip to the button but not to the slideshow itself, press the Command key as you drag the item to the button. In this case, you can’t use the image slider to change which image is displayed on the button.
You can replace the image displayed on a movie button with a single photo or with another movie clip.
To add a photo, drag an image from the Photos pane to the button until you see the green circle with the plus sign.
To add a movie clip that’s different from the movie the button links to, press the Command key as you drag the movie from the Movies pane.
To change which frame of the movie is displayed on the button, double-click the image part of the button. Select a new frame using the Movie slider that appears (shown below). If you select the Still Image checkbox, the button displays the selected frame as a still image instead of playing the movie clip.
Important: If you don’t press the Command key as you drag a movie to the button, the new movie will replace the old movie as the media item the button links to.
You can replace the image on a submenu button with a single image or with a movie clip.
Drag a single image or movie clip from the Media pane to the submenu button until you see the green circle with the plus sign
If you add a movie clip, you can select which frame is displayed in the button by double-clicking the image portion of the button and moving the slider in the Movie pane. Select the Still Image checkbox to display only the selected frame of the movie on the button.