Hi Shallie,
Normally, in standard SAP report, when you save the variant, you can choose to set up this variant is defaulted or not. But, it cannot in this report.
So, you can create another variant with all blank value in selection.
And next time, when running the report, you can choose the variant 1 (with value in some fields) or variant 2 (with blank in all fields).
Hope it's helpful to you.
Regards,
Julie