To change details on a resource that has already been catalogued, locate the record using either quick search, advanced search, Flag by Mouse or Flag by Barcode.
Locate the record to be changed, single click to highlight it then click on 'Edit' from the records toolbox on the right of the screen. Alternatively, double click the record in the grid to open it.
Make the necessary amendments here and select 'Save' to commit changes and return to the previous screen.