Improvement from JRA-7686:

As it stands Quick Search only allows you to search within summary, description, comments and text field.

Personally, it would be great to be able to add other custom fields to be searchable using the same method such as Labels, Select-list and so on.

We have many different UPC's that are requested which are logged in their own separate field within each case and to be able to simply paste this into quick search to find the request relating to it would be fantastic.