Christoph Heinrich, the Denver Art Museum's director but a contemporary curator at heart, took on the interim assignment of managing the museum's Modern and Contemporary collection during the search for a new curator this past year. Heinrich reinstalled level four in the Hamilton Building with Showing Off as a way to highlight art that's come into the DAM's permanent collection over the past several years — including gifts like the gorgeous Agnes Martin painting as well as works acquired from temporary exhibits mounted during Heinrich's tenure. The still-open show is dominated by works done by internationally famous artists: In addition to Martin, there's Nick Cave, Al Held, Glenn Ligon, Sol LeWitt and Vik Muniz. Of course, famous artists and their work are to be expected in an art museum, but what was less expected was that these art stars would keep company with a contingent of Colorado artists, including John McEnroe, Martha Daniels, Amy Metier, Maynard Tischler, Stacey Steers and Daniel Sprick — a combination that set this engaging show apart.