Mode - Zoom Rules

When you zoom to an object, the mode for the zoom to object is inherited from the zoom from object. Observe the following:

If the inherited mode is valid for the zoom to object, it is assigned.
If the inherited mode is not valid, the zoom to object is assigned its default mode as described above.
If assigned mode is DC, it shifts to RT if valid (because RT for one zoom record can be done efficiently).
If assigned mode is RT for object Pools, it shifts to LI (because RT for Pools is not efficient enough for zoom path).
If assigned mode is LI, but LI object does not exist, it shifts to RT if it is valid.

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