Specifications

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Good sensory affordance on the remote controller is the yellow
colour of the laser button. This helps the user locate the button
quickly and easily. The on-screen menu has poor sensory affordance
as it took users to much time to locate where the cursor was on the
screen the first time they accessed the menu.
Laser Button
Functional Affordance
Functional affordance is the design feature that helps the user
accomplish the tasks attended. As the Proxima 9260 is at the high
end of the market, once the user manages to achieve their goal using
the remote control it accomplish the task pretty well. It is beyond the
scope of the evaluation to assess the functional affordance of the
projector in detail.
Constraints
Norman also discussed constraints in Design of Everyday
Things; there are always constraints when designing a product.
Norman broke these up into physical, semantic, cultural and logical
constraints.