We are aware of some performance issues regarding PowerBook computers, presentation software, and video mirroring. Video mirroring uses a toolbox routine called CopyBits, which moves information from one part of memory to another.
With complex transitions, the amount of information for CopyBits to process increases dramatically, potentially causing a performance decrease. Simpler transition effects will cause less of a burden on the system.
Customers will also see improved performance when using an external monitor as the primary display, rather than mirroring the PowerBook's display to an external monitor. This is independent of the software being used.
Optimum performance can be achieved by using some of the following suggestions in the creation of the presentations:
* keep color settings to the minimum bit depth actually needed
* reduce use of animation transition effects to a minimum
* minimize use of complicated graphics
* minimize number of individual graphics per slide
* turn off virtual memory during presentations
* disable extensions that are not required during the presentation
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