Hi,
Mark the field "hotspot" in your field catalog in each check box.
The in your user command change the values of your checkboxes when sy-ucomm = '&IC1'
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You can also use radiobuttons instead of checkboxes:
https://wiki.scn.sap.com/wiki/display/Snippets/ABAP-+Radio+Buttons+in+ALV+GRID+REPORT
Check the comment in that link by Hendrik Gedicke to "group" the radiobuttons.
Regards,
Ricardo.