If you want to add index data to multiple documents, which are different on every single document, you have to
1. double click the document in the result list
2. mark the document again and press CTRL+ALT+I to change ONE documents index-data (or add a button for "quick" access.

But if you want to change multiple documents, this is very time consuming.
It should be like using the store dialog, where after modifying the next document is displayed and you can instantly move on.

Therefore: Please make it possible to easily modify index data of multiple documents in a result list.

(Additional info: If the focus is still on a document and you press CTRL+ALT+I you can not user One Click Indexing, because the marked text (via mouse) is not copied to the field with the current focus... Bug?)