X-Box Music Help

I just signed up for a X-Box Music Pass for my surface RT as I loved the collection. I can't figure out how to set up offline listening. I tried to look everywhere for help. I feel like it should be obvious but how can I listen to music offline? Is there any way I can download a whole playlist. if that's not possible just tell me how to access sings offline. Thanks in advance for helping me out in sdvance.