Enables DNA-binding transcription factor activity, RNA polymerase II-specific. Involved in memory; positive regulation of dendritic spine development; and regulation of transcription by RNA polymerase II. Located in cytoplasm and nucleus. Is expressed in nervous system; olfactory epithelium; renal cortex; and thymus. Orthologous to human FOXO6 (forkhead box O6). [provided by Alliance of Genome Resources, Apr 2022]