Since the changes described below were implemented lookup will display a list of the most recently viewed records when you click on the lookup.

Preview for usability enhancements to lookups in Unified Interface

The most recently viewed records list is populated when a user opens a record. We would like a record to also be added to the list when it is set in a lookup even if the record itself has not been opened. From a perspective of a user a record that was set in a lookup is equally as relevant as a most recently used record as one that was actually opened.
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