Koha Administration > Table Settings controls all whether fields are visible/can be toggled by users. 'Checked out by' is solely controlled by a system preference (RecordStaffUserOnCheckout) - and is not an option in the Table Settings controls. To replicate: - Set system preference: RecordStaffUserOnCheckout to 'record' - Check an item out to a patron - Go to that patron's Circulation history - cgi-bin/koha/members/readingrec.pl - Note that 'Checked out by' is visible and populated - Go to Koha > Administration > Table Settings - Choose Patrons - Choose Page: checkouthistory - Choose Table id: checkouthistory-table - Note that 'Checked out by' is not an option
This also has the effect of targeting the wrong field via Table Settings. To replicate: - Set system preference: RecordStaffUserOnCheckout to 'record' - Check an item out to a patron - Go to that patron's Circulation history - cgi-bin/koha/members/readingrec.pl - Note that 'Checked out by' is visible and populated - Go to Koha > Administration > Table Settings - Choose Patrons - Choose Page: checkouthistory - Choose Table id: checkouthistory-table - Check some fields to be 'Is hidden by default' i.e. 'checked_out_from' and 'date_due' - Reload the patron's Circulation history - Note that the columns 'Checked out from' and 'Checked out by' are hidden, but 'Date due' is not This is because 'Checked out by' is sitting in the original 'Date due' position in the table.
*** This bug has been marked as a duplicate of bug 28859 ***