Solution : https://service.sap.com/sap/support/notes/65364 (SAP Service marketplace login required)
Key words :
additional key words download, short text 'user exit, call function module -> activate, 'components' radio button, function exits group, choose edit -> component, function group 'xsop', remaining settings stay, attached source code, reference category-----------------+-----------------+-------------------c_text1
Related Notes :
| 65451 | Example of user exit for the Excel download |
| 53306 | MC94 Export to Excel does not correspond to view |