[Koha] Label creator: search by item record number range, and/or increase number of results per page

Hi there, just getting familiar with the label creator at the moment. I was wondering if there is any way to search by item number ranges (so we could work our way through from the first item added a page of labels at a time)? I'm assuming not from the available drop down but maybe other categories can be added? Also, is there anywhere to change the number of results returned? I'd like to be able to print 72 labels to a batch rather than 20.