Enables DNA-binding transcription activator activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Involved in several processes, including animal organ development; positive regulation of morphogenesis of an epithelium; and regulation of transcription, DNA-templated. Acts upstream of or within several processes, including embryonic organ morphogenesis; myoblast migration; and thymus development. Located in cytoplasm and nucleus. Is expressed in several structures, including exocrine gland; nervous system; sensory organ; tongue; and urinary system. Orthologous to human SIX4 (SIX homeobox 4). [provided by Alliance of Genome Resources, Apr 2022]