How do I print to USB printer on an iMac from MacBook Air in Target Display Mode?

I have a MacBook Air that is using Target Display Mode on an iMac via a thunderbolt cable. A USB printer is connected to the iMac. I am having trouble figuring out how to set the iMac-connected printer on my Macbook Air.

Anyone know how to do this or if it is possible?

Found the answer to my question.

Can I use the built-in camera or connect USB, ThunderBolt, or FireWire devices to my iMac when in TDM and have them work on my main computer?
A supported iMac works like any other external display while it is in Target Display mode, except that you cannot access its built-in camera or USB, ThunderBolt, and FireWire ports. To use external devices while in TDM mode, connect those devices to the computer the iMac in TDM is connecting to.

http://support.apple.com/kb/ht3924#11