We have implemented zooming up and down using the mouse wheel. Rather reluctantly. Why? Because of the nature of how TAD works, (it does real time calculations) the zooming up and down can cause stutters while displaying large models.

A better alternative is to use the Ariel Navigator – you can easily zoom and pan to various locations on the model using a on screen image of the entire model.

To stop use of the scroll wheel, you can change this application setting.