For the abstract review additional checkboxes can be configured. This can be used e.g. when you want to award an abstract and your reviewers can vote for it.
The setup can be found in Abstract - Review-Setup - Additional queries.
The first input "Identifier (for Export)" will be shown in the export "excel - voter" (in Adminstration - Exports - Dropdown "abstracts". The second input "text" will be shown in the abstract review.
In the export only "yes" values will be shown.