Fla. Stat. § 26.57
A county court judge may be designated on a temporary basis to preside over circuit court cases by the Chief Justice of the Supreme Court upon recommendation of the chief judge of the circuit. He or she may be assigned to exercise all county and circuit court jurisdiction in the county, except appeals from the county court. In addition, he or she may be required to perform the duties of circuit judge in other counties of the circuit as time may permit and as the need arises, as determined by the chief judge of the circuit. A county court judge designated to preside over circuit court cases shall receive the same salary as a circuit court judge, to the extent that funds are specifically appropriated by law for such purposes.
Fla. Stat. § 26.57