The maximum number of on-screen results returned by Quick Find can be configured.
This is a system wide maximum value for all users and is set in Quick Find configuration area.
Results appear as a scrollable list.
The Quick Find results are also optimised. The query does a full match search combined with wildcard search and provides increased relevancy scoring on results.
Quick Find displays results from multi-line text fields
You can see that in the screen shot below of a communication summary screen that this communication references an engineer call out. Note that the task has the subject 'Help for Tony'
We can see that the Task 'Help for Tony' is listed in the result set.