Presentation preferences

In presentation mode, you can highlight objects on the canvas.

Choose whether to have an object become highlighted whenever you put the pointer on it, whenever you click it, or never. You can also choose to display a badge for objects that have actions set up in the Properties: Action inspector.

Click the color well to choose a color for the highlight. One good trick is to use selectedControlColor from the Developer palette; this color always matches the highlight color selected in Mac OS X's Appearance preferences. Use the slider to control the thickness of the highlight.