The special effects that a computer can give include transitions, build effects and added sounds. Transitions are the way the computer changes over from one slide to the next. Several effects are available. We prefer to use only 2 to 3 types of transition in each presentation. The random choice is to be avoided as the computer can randomly assign an inappropriate transition to a slide.
Build effects are the way each 'object' of the slide appears.
These objects may be a graphic, a circle or a rectangle round a point the speaker wants to highlight or the way different lines in a bulleted list appear. Again several choices are available. It is recommended that objects do not cross each other in the process of appearing on the screen, as it has a jarring effect. The timing has to be set so that it coincides with the talk accompanying the projection. It is best to keep the effect on 'click' of the mouse button so that the speaker can control the effect.