The Export Summary option is intended to display the main summary comment added when Leave is assigned or applied for as per these screenshots:


Similarly, any comments added to the main comments section (circled below) by either the Admin or ESS user, will appear in the Export Summary view:

Export Detail => This option is intended to display the detailed view of each day of the leave request. If several days have been applied for and comments have been added for some or all of these days, the comments specific to this multiple-day leave request will be displayed in the Export Detail view.
