In a child custody proceeding pursuant to Family Court Act article 6, the mother appeals, as limited by her brief, from so much of an order of the Family Court, Orange County (Bivona, J.), entered November 19, 2009, as, after a hearing, granted the father’s petition to modify a prior order of the same court dated March 25, 2009, so as to award him sole legal and physical custody of the subject child.
Ordered that the order is affirmed insofar as appealed from, without costs or disbursements.
“To modify an existing custody arrangement, there must be a showing of a change of circumstances such that modification is required to protect the best interests of the child” (Matter of Zeis v Slater, 57 AD3d 793, 793 [2008]; see Matter of Jones v Leppert, 75 AD3d 552 [2010]; Matter of Gilleo v Williams, 71 AD3d 1023 [2010]). The best interests of the child are determined by a review of the totality of the circumstances (see Eschbach v Eschbach, 56 NY2d 167, 171 [1982]). “Since any custody determination depends to a very great extent upon the