Blueberry Imac Won't Drag & Drop

Spencer Nilsen

My 4 yr old blueberry iMac somehow lost the ability to "drag & drop" anything, desktop or otherwise. It is running OS 10.2.8 and only recently developed this problem. Might I have accidentally turned something on or off?

Thank you in advance for your help.

Spencer Nilsen

P.S. I have intermediate knowledge and understanding of Mac technology.