It is possible to customise some of the tabs which are displayed on the Circulate screen.
There are several tabs within Circulate which allow for their views to be modified, these include Current Loans, Reservations, Past Loans and Statement.
The Method for modifying the view is the same for each tab.
Open Circulate and select a Borrower.
Select the tab you wish to modify then click on the views 
icon.
Select the desired fields to show in the page view from the page view editing window. The changes made to the view will remain in effect until you change them again.