Leads can be allocated and updated quickly by using the leads pipeline page's update option- without moving off the list itself. There is a "Mass Update" option on the leads pipeline. The following will teach you how to use it.
Expand "Leads and Opportunities" tab and click "Leads Pipeline".
If you tick the Update box, everything below will automatically be ticked. This will enable you to make edits. By clicking the value, a window will pop out and you can edit values.
Once you are done editing your leads, go ahead and click the "Update" button.