Bulk Updates

I run a query that returns 500+ candidate records. I want to perform a bulk update on those 500+ candidate records. The only way I seem to be able to perform this is to click the 100 candidate records returned on the 1st page, then perform the bulk update on them, then forward to the next 100 records and perform the bulk update on those records, and so on and so on...

Is there no facility to perform one bulk update on all the records returned in a query in one operation? If the answer is no, then my next question is why? I have over 4000 records I need to update and this is extremely inefficient.

Please help.