The art of Fanny Sanín has an open-ended quality that allows viewers the freedom to explore the abstract elements. By Rebecca Allan From her inviting, well-ordered studio overlooking upper Manhattan and illuminated by northern light, the painter Fanny Sanín slides open the drawer of a large flat file brimming with decades of work. She locates the folder containing a series of studies for a painting, Acrylic No. 1, 2015, protectively interleaved with glassine paper.